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মাধ্যমিক বিজ্ঞান বান্ডেল - ইংলিশ ভার্সন

নবম - দশম শ্রেণীর ইংলিশ ভার্সন বিজ্ঞান বিভাগের সব কোর্স এই বান্ডেলের অন্তর্ভুক্ত

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এই বান্ডেল এ যা যা পাচ্ছেন -

  1. পদার্থ বিজ্ঞান 
  2. রসায়ন 
  3. উচ্চতর গণিত 
  4. সাধারন গণিত   
  5. আইসিটি
  6. ইংরেজি ১ম ও ২য় পত্র

সবগুলো কোর্স এর - 

  • ৮৪২ টি লেকচার 
  • প্রতিটি অধ্যায় শেষে বহু নির্বাচনী প্রশ্ন 
  • সকল কোর্স এর সম্পূর্ণ সিলেবাস এর অডিও- ভিডিও কন্টেন্ট  

কোর্সের উপাদান

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কোর্স সমূহ

1042

লেকচার

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পরীক্ষা সমূহ

  • লেকচার
  • 1. Variable and degree of equation.mp4
  • 3. Differences between equations and identities.mp4
  • 2. Equation and Identity.mp4
  • 6. Problem solving regarding linear equation.mp4
  • 4. Differences between linear equations and quadratic equations.mp4
  • 5. Problem solving regarding linear equation.mp4
  • 7. Problem solving regarding linear equation.mp4
  • 8. Problem solving regarding linear equation.mp4
  • 10. Problem solving regarding quadratic equation.mp4
  • 9. Problem solving regarding linear equation.mp4
  • 11. Problem solving regarding quadratic equation.mp4
  • 12. Problem solving regarding quadratic equation.mp4
  • 1. Adjacent angle, Acute angle, Complementary angle, and supplementary angle.mp4
  • 2. Theorem.mp4
  • 3. Equilateral triangle, Isosceles triangle, Scalene triangle, Acute triangle, Right angled triangle, and Obtuse triangle.mp4
  • 4. Theorem_ Corresponding sides and angles of two triangles are equal and congruence to each other.mp4
  • 6. Theorem_ If one angle of a triangle is greater than another, the side opposite the greater angle is greater than the side opposite the lesser.mp4
  • 5. Theorem_ If two sides of a triangles are equal, the angle opposite the equal sides are equal.mp4
  • 7. Theorem_ the line segment joining the midpoints of any two sides of a triangle is parallel to the third side and the length is its half.mp4
  • 8. Pythagoras theorem_ In a right-angled triangle the square on the hypotenuse is equal to the sum of the square regions on two other sides.mp4
  • 3. Classifications_Fractional Numbers and Rational Numbers.mp4
  • 1. Classification of Real Numbers.mp4
  • 2. Classifications_Natural Numbers and Real Numbers.mp4
  • 6. Prove that √2 is an irrational number.mp4
  • 4. Classifications_Irrational Numbers and Decimal Fractional Numbers.mp4
  • 5. Classifications_ Positive Numbers, Negative Numbers,.mp4
  • 7. Prove that when one is added to the product of 4 consecutive natural numbers this is perfect square.mp4
  • 8. Addition and subtraction of repeating numbers.mp4
  • 9. Find the rational and irrational number.mp4
  • 10. Convert numbers into fraction.mp4
  • 11. Multiplication and division of repeating fraction.mp4
  • 9. Example.mp4
  • 1. Angle of elevation and Angle of depression.mp4
  • 2. Problem solving_ The angle of elevation at the top of the tower at a point of a ground is 30° at a distance of 75 metre from the fort..mp4
  • 3. Problem solving_ A tree is leaned due to storm..mp4
  • 4. Problem solving_ The angle of elevation at a point of the roof of the building is 60° in any point on the ground..mp4
  • 5. Problem solving_ A pole of 64 metres long breaks into two parts.mp4
  • 1. Definition of Set.mp4
  • 2. Subsets.mp4
  • 3. Methods of Describing Set.mp4
  • 4. Types of Sets, Difference of Sets, and Venn Diagram.mp4
  • 5. Complement of a Set, Union of Set, and Intersection of Sets.mp4
  • 6. Power Set and Functions.mp4
  • 7. Cartesian Product.mp4
  • 8. Problem Solving Regarding Set.mp4
  • 9. Problem Solving Regarding Set.mp4
  • 10. Problem Solving Regarding Venn Diagram.mp4
  • 11. Domain and Range.mp4
  • 12. Problem Solving Regarding Domain and Range.mp4
  • 13. Problem Solving Regarding Functions.mp4
  • 14. Problem Solving Regarding Functions.mp4
  • 15. Problem Solving Regarding Functions.mp4
  • 1. Ratio, Proportion, Continued proportion, and Successive ratio.mp4
  • 2. Problem solving_ regarding the ratio of percentages.mp4
  • 3. Problem solving_ If two ratios of an equation is equal prove that an algebraic equation is equal.mp4
  • 4. Problem solving_ If an algebraic equation is equal prove that another algebraic equation is equal.mp4
  • 5. Problem solving_ If an algebraic equation is equal prove that two algebraic equations are equal.mp4
  • 6. Problem solving_ If an algebraic equation is equal prove that a, b, c is ordered proportional.mp4
  • 7. Problem solving_ If a, b, c are quantities of same kind, identify the ordered proportion of a, b and c.mp4
  • 8. Problem solving regarding percentage.mp4
  • 9. Problem solving regarding the ratio and area of a land.mp4
  • 10. Problem solving regarding the ratio and area of a land.mp4
  • 11. Problem solving regarding the ratio and area of a land.mp4
  • 1. If an algebraic expression is given, identify the value.mp4
  • 2. Prove that an algebraic expression is equal to the another.mp4
  • 3. If an algebraic expression is given, identify the value.mp4
  • 4. If an algebraic expression is given, identify the value.mp4
  • 6. If an algebraic expression is given, identify the value.mp4
  • 5. If an algebraic expression is given, identify the value.mp4
  • 7. If an algebraic expression is given, identify the value.mp4
  • 8. Prove that an algebraic expression is equal to the another.mp4
  • 10. If an algebraic expression is given, prove that an algebraic expression is equal to the another.mp4
  • 9. Identify the value of an algebraic expression.mp4
  • 11. If an algebraic expression is given, identify the value.mp4
  • 12. Problem solving regarding resolution into factor.mp4
  • 13. Problem solving regarding resolution into factor.mp4
  • 14. Problem solving regarding resolution into factor.mp4
  • 16. Problem solving regarding remainder theorem.mp4
  • 15. Problem solving regarding remainder theorem.mp4
  • 18. Problem solving regarding cost and budget.mp4
  • 17. Problem solving regarding remainder theorem.mp4
  • 20. Problem solving regarding speed of boat and current.mp4
  • 19. Problem solving regarding work and time.mp4
  • 22. Problem solving regarding profit and loss percentage.mp4
  • 21. Problem solving regarding water tank and pipe.mp4
  • 24. Problem solving regarding simple profit.mp4
  • 23. Problem solving regarding compound principle and compound profit.mp4
  • 25. Problem solving regarding profit principle and rate of profit.mp4
  • 1. Exponents and it’s rules.mp4
  • 2. Logarithm and an example of logarithm.mp4
  • 3. Rules of logarithm.mp4
  • 4. Problem solving regarding exponents.mp4
  • 6. Problem solving regarding exponents.mp4
  • 5. Problem solving regarding exponents.mp4
  • 7. Problem solving regarding logarithm.mp4
  • 8. Problem solving regarding logarithm.mp4
  • 9. Problem solving regarding logarithm.mp4
  • 10. Problem solving regarding logarithm.mp4
  • 11. Problem solving regarding logarithm.mp4
  • 1. 7.1 Construction 1_ The base, the base adjacent angle and the sum of other two sides of triangle are given.mp4
  • 2. Construction 2_ The base of a triangle, an acute angel adjacent the base and the difference between other two sides are given. Construct the triangle.mp4
  • 1. 8.1 Circle, Chord, Diameter, and Radius.mp4
  • 2. Theorem 1_ All equal chord of a circle are equidistant from the centre.mp4
  • 3. Construction 3_ Two angles adjacent to the base and perimeter of a triangle are given. Construct the triangle.mp4
  • 4. Construction 4_ Construct a triangle when a base adjacent angle, the altitude (Height) and the sum of other two sides are given.mp4
  • 5. 7.2 Construction 1_ Two diagonals and an angle included between them of a parallelogram are given. Construct the parallelogram.mp4
  • 6. Construction 2_ Two diagonals and a side of a parallelogram are given. Construct the parallelogram.mp4
  • 7. Construction 3_ The length of two diagonals of a rhombus is given. Construct the rhombus.mp4
  • 8. Construction 4_ The perimeter of a square is given. Construct the square.mp4
  • 3. Theorem 2_ Chords equidistant from the centre of the circle are equal.mp4
  • 4. 8.2 Arc of circle, Angle in circle, and Angle at the centre.mp4
  • 5. Theorem 1_ The angle subtended by the same arc at the centre is double of the angle subtended by it at any point on the remaining part of the circle.mp4
  • 6. Theorem 2_ Angles in a circle standing on the same arc are equal.mp4
  • 7. Theorem 3_ The angle inscribed in the semicircle is a right angle.mp4
  • 8. 8.3 Theorem 1_ The sum of two opposite angles of a quadrilateral inscribed in a circle is two right angles.mp4
  • 9. Theorem 2_ If two opposite angles of a quadrilateral are supplementarily the four verticals of quadrilateral are concyclic.mp4
  • 10. Theorem 3_ The opposite angles of the quadrilateral ABCD are supplementary to each other. If the line AC is the bisector of ∠BAD, prove that BC=CD.mp4
  • 11. 8.4 Tangent and Common tangent.mp4
  • 12. Theorem 1_If two tangents are drawn to a circle from an external point the distances from those points of contact are equal.mp4
  • 13. Theorem 2_ If two circles touch each other externally, the point of contact of the tangent and centers are collinear.mp4
  • 14. 8.5 Construction 1_ To draw a tangent to a circle from a point outside.mp4
  • 15. Construction 2_ To draw a circle circumscribing a given triangle.mp4
  • 16. Construction 3_ To draw a circle inscribed in a triangle.mp4
  • 4. Problem solving_ Identify the value of a trigonometric ratio and prove a trigonometric equation.mp4
  • 1. 9.1 Ratio of trigonometric angles.mp4
  • 2. Opposite ratios.mp4
  • 3. Trigonometric identity.mp4
  • 5. Problem solving_ Prove of trigonometric equation.mp4
  • 6. Problem solving_ Prove of trigonometric equations.mp4
  • 1. 12.1 Problem solving regarding simple simultaneous equations in two variables.mp4
  • 7. Problem solving_ if a value of a trigonometric identity is given, identify the value of another trigonometric identity.mp4
  • 2. Problem solving regarding simple simultaneous equations in two variables.mp4
  • 3. Problem solving regarding simple simultaneous equations in two variables.mp4
  • 8. 9.2 Problem solving_ Identify the value of trigonometric identities.mp4
  • 4. 12.2 Problem solving by the method of substitution.mp4
  • 5. Problem solving by the method of elimination.mp4
  • 6. Problem solving by the method of cross multiplication.mp4
  • 7. Problem solving by the method of cross multiplication.mp4
  • 1. 13.1 Problem solving regarding arithmetic series.mp4
  • 2. Problem solving regarding arithmetic series.mp4
  • 8. 12.3 Problem solving by graphical method.mp4
  • 3. Problem solving regarding arithmetic series.mp4
  • 4. Problem solving regarding arithmetic series.mp4
  • 12. Problem No. 2.mp4
  • 9. Problem solving by graphical method.mp4
  • 10. Problem solving by graphical method.mp4
  • 11. Problem No. 1.mp4
  • 13. Problem No. 3.mp4
  • 14. Problem No. 4.mp4
  • 15. Problem No. 4.mp4
  • 5. Problem solving regarding arithmetic series.mp4
  • 6. 13.2 Find the sum of the geometric series.mp4
  • 7. Find the sum of the first eight terms of a geometric series.mp4
  • 8. Find the sum of (2n+1) terms of a geometric series.mp4
  • 1. Rules for ratio problems.mp4
  • 2. Theorem_ If the heights of two triangles are equal, their base and areas are proportional..mp4
  • 9. Problem solving regarding geometric series.mp4
  • 10. Find the value of n and sum of an arithmetic series.mp4
  • 11. Find the value of n and sum of an arithmetic series.mp4
  • 12. Problem solving regarding geometric series.mp4
  • 13. Problem solving regarding geometric series.mp4
  • 3. Theorem_ If a line segment divides the two sides or their produced section of a triangle proportionally, it is parallel two the third side..mp4
  • 4. Theorem_ The internal bisectors of an angle of a triangle divides its opposite side in the ratio of the sides constituting of the angle..mp4
  • 5. Theorem_ If the sides of two triangles are proportional, the opposite angles of their matching sides are equal.mp4
  • 6. Theorem_ The ratio of the areas of two similar triangles is equal to the ratio of squares of any two matching sides.mp4
  • 7. Construction_ To divide a given line segment internally in a given ratio.mp4
  • 1. Theorem_ Areas of all triangular regions having same base and lying between the same pair of parallel line are equal to one another.mp4
  • 2. Theorem_ Parallelogram lying on the same base and between the same pair of parallel lines are equal area.mp4
  • 3. Theorem_ The area of triangle is exactly half of the area of a parallelogram lying on the same base and between the same pair of parallel lines of triangle.mp4
  • 4. Construction_ Construct a parallelogram with an angle equal to a definite angle and area equal to a triangular region.mp4
  • 5. Construction_ Construct a triangle with area of triangular region equal to that of quadrilateral region.mp4
  • 1. Problem solving_ Length of two sides and an angle of a triangle is given. Find the area of the triangle.mp4
  • 2. Problem solving_ Length of three sides of a triangle is given. Find the area of the triangle.mp4
  • 3. Problem solving_ Find the length of the side of an equilateral triangle.mp4
  • 4. Problem solving_ The area and base of an isosceles triangle is given. Find the length of equal sides.mp4
  • 5. Problem solving_ The perimeter and length of the sides of the triangle is given. Find the area of triangle.mp4
  • 6. Problem solving_ Length, breath and area of a rectangular room is given. Determine the perimeter and length of the diagonal.mp4
  • 7. Problem solving_ Width and area of a road around a square field is given. Determine the area of the field excluding the road.mp4
  • 8. Problem solving_ The length of the sides of the parallelogram and length of the smaller diagonal are given. Determine the length of the other diagonal.mp4
  • 3. Exercise Problem- Finding Cumulative Frequency.mp4
  • 1. Various Terms related to Statistics-.mp4
  • 2. Exercise Problem- Finding Frequency of Given data-.mp4
  • 13. Problem solving_ The radius and angle at the center of circle are given. Find the length of the arc and the area of the circular segment.mp4
  • 9. Problem solving_ The lengths of two parallel sides and other two sides of a trapezium are given. Determine the area of the trapezium.mp4
  • 10. Problem solving_ The length of the diagonal and the area of a rhombus are given. Determine the other diagonal and perimeter.mp4
  • 11. Problem solving_ The perimeter and smaller diagonal of a rhombus are given. Find the other diagonal and the area of the rhombus.mp4
  • 12. Problem solving_ If the length of each side of a regular pentagon is given. Determine the area of the pentagon.mp4
  • 14. Problem solving_ The diameter of a circular field and the width of a path around the field are given. Find the area of the path.mp4
  • 15. Problem solving_ Diameter of a wheel and a distance are given. Find how many times the wheel will move.mp4
  • 16. Problem solving_ Determine the difference of radius of two wheels.mp4
  • 17. Problem solving_ ABCD is a square and AED is a half-circle. Determine the area of the whole region.mp4
  • 4. Exercise Problem- Drawing Histogram of Frequency Distriburtion.mp4
  • 5. Exercise Problem- Finding Arithmetic Mean.mp4
  • 6. Exercise Problem- Finding Median.mp4
  • 7. Exercise Problem- Finding Median.mp4
  • 8. Exercise problem- Finding Mode.mp4
  • 21. Problem solving_ The length, width and height of a rectangular solid are given. Determine the area of the whole surface, volume, and length of the diagonal.mp4
  • 18. Problem solving_ A rectangle ABCD and a circular segment DAE are given. Determine the length of arc DE and the area of the whole region.mp4
  • 19. Problem solving_ The diameter of the front wheel and back wheel of a car is given. Determine how many times more the front wheel will revolve than the back one to cover a certain distance.mp4
  • 20. Problem solving_ The diameter of a circular park and the width of a road around the park is given. Determine the area of the road.mp4
  • 22. Problem solving_ The area of the whole surface of a cube is given. Determine the length of its diagonal.mp4
  • 23. Problem solving_ If the height and radius of the base of a right circular cylinder is given. Determine its volume and area of the whole surface.mp4
  • 24. Problem solving_ The outer measurement of a rectangular wooden box is given, and area of whole inner surface is given. Determine the thickness of the wooden box.mp4
  • 25. Problem solving_ The area of curved surface and volume of a right circular cylinder are given. Determine the height and the radius of the cylinder.mp4
  • 1. Various Terms related to Statistics-.mp4
  • 2. Exercise Problem- Finding Frequency of Given data-.mp4
  • 3. Exercise Problem- Finding Cumulative Frequency.mp4
  • 4. Exercise Problem- Drawing Histogram of Frequency Distriburtion.mp4
  • 5. Exercise Problem- Finding Arithmetic Mean.mp4
  • 6. Exercise Problem- Finding Median.mp4
  • 7. Exercise Problem- Finding Median.mp4
  • 8. Exercise problem- Finding Mode.mp4
  • ফাইল

  • লেকচার
  • 1. একুশ শতক এবং তথ্য ও যোগাযোগ প্রযুক্তি.mp4
  • 2. তথ্য ও যোগাযোগ প্রযুক্তির বিকাশে উল্লেখযোগ্য ব্যক্তিত্ব.mp4
  • 3. ই-লার্নিং ও বাংলাদেশ, ই-লার্নিংয়ে মাল্টিমিডিয়ার ভূমিকা, ই-লার্নিং এর সীমাবদ্ধতা, এবং ই-লার্নিং এর সীমাবদ্ধতা দূর করার উপায়.mp4
  • 4. ই-গভর্ন্যান্স ও বাংলাদেশ এবং ই-গভর্ন্যান্স এর সুবিধা.mp4
  • 5. ই- সার্ভিস ও বাংলাদেশ, কিছু উল্লেখযোগ্য ই- সার্ভিস কার্যক্রম.mp4
  • 6. ই- কমার্স ও বাংলাদেশ.mp4
  • 7. বাংলাদেশের কর্মক্ষেত্রে আইসিটি ও এর প্রভাব.mp4
  • 8. সামাজিক যোগাযোগ ও আইসিটি_ ফেসবুক, টুইটার.mp4
  • 9. বিনোদন ও আইসিটি, সময়ের সাথে বিনোদন মাধ্যমের পরিবর্তন.mp4
  • 10. ডিজিটাল বাংলাদেশ, এনালগ ও ডিজিটাল, ডিজিটাল বাংলাদেশ বাস্তবায়ন, বঙ্গবন্ধু স্যাটেলাইট-১.mp4
  • 1. সফটওয়্যার ও কম্পিউটার রক্ষণাবেক্ষণে সফটওয়্যারের গুরুত্ব.mp4
  • 2. সফটওয়্যার ইন্সটলেশন ও আনইন্সটলেশন, সফটওয়্যার ইন্সটলের পূর্বে লক্ষণীয়, সফটওয়্যার ইন্সটলের কিছু ধাপ, সফটওয়্যার আনইন্সটলের কিছু ধাপ.mp4
  • 3. সফটওয়্যার ডিলিটের কিছু ধাপ.mp4
  • 4. কম্পিউটারের ভাইরাস, ভাইরাস আক্রমণের লক্ষণ এবং এর ক্ষতিকারক দিক.mp4
  • 5. এন্টিভাইরাস, এন্টিভাইরাসের কাজ, কিছু এন্টিভাইরাসের নমুনা, কম্পিউটার ভাইরাস মুক্ত রাখতে আমাদের করণীয়.mp4
  • 6. পাসওয়ার্ড, পাসওয়ার্ডের কাজ, ইউনিক পাসওয়ার্ড, পাসওয়ার্ড ইউনিক না হলে যা হয়, ও ইউনিক পাসওয়ার্ড তৈরীর নিয়ম.mp4
  • 7. ওয়েবে নিরাপদ থাকা, সাধারণ সাইট ও সতর্কতা, সামাজিক সাইট ও সতর্কতা, বয়সোপযোগী সাইট.mp4
  • 8. কম্পিউটার ও ইন্টারনেট আসক্তি, আসক্তি থেকে মুক্ত থাকার উপায়.mp4
  • 9. পাইরেসি, কপিরাইট আইন, কপিরাইট আইনের প্রয়োজনীয়তা.mp4
  • 10. তথ্য অধিকার ও নিরাপত্তা, ও তথ্য অধিকার আইন.mp4
  • 11. ট্রাবলশুটিং.mp4
  • 12. ব্যবহারিক, সফটওয়্যার ইন্সটল ও সফটওয়্যার আনইন্সটলের কিছু ধাপ.mp4
  • 1. ডিজিটাল কনটেন্ট, ও এর প্রকারভেদ.mp4
  • 2. ই-বুক, ই-বুক ব্যবহারের সুবিধা, ই-বুকের প্রকারভেদ.mp4
  • 3. শিক্ষায় ইন্টারনেট, সহযোগী উপকরণ, প্রয়োজনীয় অবকাঠামো, পাঠ্য বইয়ের সহজলভ্যতা, ও শিক্ষা সহায়ক ক্লাব.mp4
  • 4. আগামী দিনের ক্যারিয়ার গঠনে আইসিটি এবং ফ্রিল্যান্সিং ও প্রোগ্রামিং.mp4
  • 1. ওয়ার্ডপ্রসেসর ও এর সুবিধা.mp4
  • 2. অফিস বাটন ও এর অপশনগুলো এবং এর প্রয়োজনীয়তা, লেখালেখির সাজসজ্জা, বুলেট, নম্বর এবং লাইনের ব্যবধান.mp4
  • 4. স্প্রেডশিট, স্প্রেডশিট বিশ্লেষনের বৈশিষ্ট্যসমূহ, ও স্প্রেডশিট ব্যবহারের ক্ষেত্র.mp4
  • 5. স্প্রেডশিট ব্যবহারের কৌশল, গুন করা, ফলাফল সেটে স্প্রেডশিট ফাংশন, ভাগ করা, ও শতকরা নির্ণয়.mp4
  • 6. ব্যবহারিক_ লেখালেখির সাজসজ্জা, বুলেট, নম্বর এবং লাইনের ব্যবধান.mp4
  • 7. ব্যবহারিক_ টেবিল ও বিভিন্ন ইন্সট্রাকশন, ছবি যোগ করা, ওয়ার্ড আর্ট যোগ করা, এবং মার্জিন ঠিক করা, বানান পরীক্ষণ ও সংশোধন.mp4
  • 8. ব্যবহারিক_ স্প্রেডশিটের ব্যবহার.mp4
  • 1. মাল্টিমিডিয়া ও মাল্টিমিডিয়ার মাধ্যম.mp4
  • 2. শিক্ষার উপকরণ হিসেবে মাল্টিমিডিয়ার ব্যবহার, বিনোদনে বিজ্ঞাপনে, গেমস ও এনিমেশনে মাল্টিমিডিয়া, এবং মাল্টিমিডিয়া ও কর্মসংস্থান.mp4
  • 3. প্রেজেন্টেশন সফটওয়্যার, পাওয়ার পয়েন্ট প্রোগ্রাম খোলা, ও পাওয়ার পয়েন্টের কিছু ফিচার.mp4
  • 4. প্রেজেন্টেশন ফাইল সেভ করা, নতুন স্লাইড যোগ করা, প্রেজেন্টেশন স্লাইড প্রদর্শন, স্লাইডে ব্যাকগ্রাউন্ড যুক্ত করা.mp4
  • 5. স্লাইডে ছবি যুক্ত করা, স্লাইডে ও টেক্সট বক্সে ট্রানজিশন যুক্ত করা, স্লাইডে ভিডিও যুক্ত করা.mp4
  • 6. গ্রাফিক্স, ফটোশপের কাজ, ফটোশপ প্রোগ্রাম খোলা ও ফাইল তৈরি.mp4
  • 7. পিক্সেল, Color Mode, ব্যাকগ্রাউন্ড, টুলবক্স এবং প্যালেট পরিচিতি.mp4
  • 8. সিলেকশন টুল ও মুভ টুল, সিলেকশন স্থানান্তরিত করা, ফেদার এর ব্যবহার,.mp4
  • 9. ল্যাসো টুল এবং পলিগোনাল ল্যাসো টুল, স্ট্রোক, ফাইল সেভ.mp4
  • 10. লেয়ার ও নতুন লেয়ার যুক্ত করা.mp4
  • 11. থাম্বনেল আইকন, গুচ্ছ প্যালেট, প্যালেট যুক্ত-বিযুক্ত, লেয়ারে অবজেক্ট তৈরী, টেক্সট লেয়ার তৈরী.mp4
  • 12. এক ফাইলের ছবি অন্য ফাইলে স্থানান্তর, টার্গেট লেয়ার নির্ধারণ করা, লেয়ারের ওপাসিটি পরিবর্তন, লেয়ার বাতিল করা.mp4
  • 14. ইলাস্ট্রেটর, ইলাস্ট্রেটর প্রোগ্রাম খোলা, ইলাস্ট্রেটরে নতুন ফাইল খোলা, টাইটেল বার, টুলবক্স পরিচিতি.mp4
  • 15. অবজেক্টে রং প্রয়োগ, কালার আইকন, জুম টুলের ব্যবহার, হ্যান্ড টুলের ব্যবহার.mp4
  • 16. অবজেক্ট ভিউ মোড, অবজেক্ট তৈরি, অবজেক্ট সিলেক্ট ও পাথ মুছে ফেলা, পাথ বা প্রান্তরেখা.mp4
  • 18. স্ট্রোকের ব্যবহার, পেন ও পেন্সিল টুল, বন্ধ পাথ ও খোলা পাথ, পেন টুলের সাহায্যে পাথ তৈরি, পাথ সম্পাদনা.mp4
  • 19. টাইপ টুল, লেখা সম্পাদনা, পাথে টাইপ করা, অক্ষরের আউটলাইন তৈরি করা, ও ইলাস্ট্রেটরে ছবি বা ইমেজ স্থাপন.mp4
  • 1. ডেটাবেজ, ডেটাবেজ প্রোগ্রামের বৈশিষ্ট্য, ডেটাবেজ ম্যানেজমেন্ট সিস্টেম (DBMS) ও এর গুরুত্ব.mp4
  • 4. রিপোর্ট তৈরি ও রিপোর্টে গ্রিডলাইন যুক্ত করা.mp4
  • ফাইল
  • Chapter 1_ তথ্য ও যোগাযোগ প্রযুক্তি এবং আমাদের বাংলাদেশ.pdf
  • Chapter 2_ কম্পিউটার ও কম্পিউটার ব্যবহারকারীর নিরাপত্তা.pdf
  • Chapter 3_ আমার শিক্ষায় ইন্টারনেট.pdf
  • Chapter 4_ আমার লেখালেখি ও হিসাব.pdf
  • Chapter 5_ মাল্টিমিডিয়া ও গ্রাফিক্স.pdf
  • Chapter 6_ ডেটাবেজ এর ব্যবহার.pdf

  • লেকচার
  • 1. Concept and History of Chemistry.mp4
  • 2. Progress History of Chemistry.mp4
  • 3. Scopes of Chemistry.mp4
  • 4. Example of Chemistry-.mp4
  • 5. Relation between Chemistry and other departments of Science.mp4
  • 6. The Process of Research in Chemistry.mp4
  • 7. Safety Measures in Chemistry Laboratory and in use of chemicals.mp4
  • 8. Chemical Substances, Their Risk and Precaution.mp4
  • 1. Matter and Its States.mp4
  • 2. Kinetic Theory of Particles.mp4
  • 3. Intermolecular Space and Intermolecular Attraction Force.mp4
  • 4. Compressibility and Expandability.mp4
  • 5. Characteristics of Solid, Liquid and Gases.mp4
  • 10. Three States of Matter at a time.mp4
  • 6. Characteristics of Plasma.mp4
  • 7. Melting and Boiling,Changes in State of Matter.mp4
  • 8. Diffusion and Example of Diffusion.mp4
  • 9. Effusion, Differences between Diffusion and Effusion.mp4
  • 11. Distillation, Sublimation.mp4
  • 12. Experiment KMnO4 in Water.mp4
  • 13. Experiment Diffusion of Liquid Solution in Liquid and Diffusion of two gases.mp4
  • 14. State Change of Matter Explained with Graph, Cooling Curve of Vapor.mp4
  • 15. Sublimation of Substances.mp4
  • 1. Elements and Compounds.mp4
  • 2. Atoms and Molecules, Symbols of Elements.mp4
  • 3. Formula.mp4
  • 4. Characteristics of Proton, Electron and Neutron.mp4
  • 5. Atomic Number and Mass Number.mp4
  • 10. Energy Emission and Absorption, Success and Limitation of Bohr’s Model.mp4
  • 6. Rutherford’s Atomic Model.mp4
  • 7. Limitations of Rutherford’s Atomic Model.mp4
  • 8. Bohr’s Atomic Model.mp4
  • 9. Angular Momentum.mp4
  • 11. Orbital Electronic Configuration of Atoms, Energy Sublevels.mp4
  • 12. s, p, d, f Orbital.mp4
  • 13. Electronic Configuration In Atoms.mp4
  • 14. Electronic Configuration in Atoms (Exceptional Cases).mp4
  • 15. Electronic Configuration in Atoms (Exceptional Cases).mp4
  • 16. Isotopes.mp4
  • 17. Reason Behind the occurence of Isotopes.mp4
  • 18. Radioactive Isotopes and Use of Radioactive Isotopes in Various fields.mp4
  • 19. Impact of Radioactive Isotopes.mp4
  • 20. Relative Atomic Mass, Determining Average Relative Atomic Mass from Percentage of Isotopes.mp4
  • 21. Determining Relative Molecular mass from Relative Atomic Mass.mp4
  • 5. Determination of an element in periodic table.mp4
  • 1. History Behind the Invention of Periodic Table.mp4
  • 2. History Behind the Invention of Periodic Table.mp4
  • 3. Atomic Number and it’s importance in periodic table.mp4
  • 4. Characteristics of Periodic table.mp4
  • 6. Determination of an element in periodic table.mp4
  • 7. Exception of Periodic Tables.mp4
  • 8. Periodic Property-Metallic Property.mp4
  • 9. Periodic Property -Non-Metallic Property.mp4
  • 10. Submetals.mp4
  • 11. Periodic Property- Atomic Radius.mp4
  • 12. Periodic Property- Ionization Energy.mp4
  • 13. Ionization Energy Related Questions.mp4
  • 14. Periodic Property-Electron Affinity.mp4
  • 15. Periodic Property-Electronegativity.mp4
  • 16. Special Names of Group.mp4
  • 17. Special Names of Group.mp4
  • 18. Advantages of Periodic table.mp4
  • 19. Chemical Reaction based on Groups.mp4
  • 1. Octet and Duet Rule.mp4
  • 2. Example of Octet and Duet Rule.mp4
  • 3. Exception of Octet Rule-Incomplete and Expanded Octet.mp4
  • 4. Valence Electron.mp4
  • 5. Valency.mp4
  • 6. Variable Valency.mp4
  • 7. Radicals and their Valency.mp4
  • 8. Chemical Formula.mp4
  • 9. Ways of Writing a Chemical Formula.mp4
  • 10. Molecular Formula and Structural Formula.mp4
  • 11. Inert Gases and their stable electronic configuration.mp4
  • 12. Reason behind the formation of Chemical Bonds.mp4
  • 13. Cation and Anion.mp4
  • 14. Ionic Bond.mp4
  • 15. Covalent Bond.mp4
  • 16. Example of Covalent Bond.mp4
  • 17. Characteristics of Chemical Bonds-Melting points and Boiling Points_1.mp4
  • 18. Characteristics of Chemical Bonds-Solubility.mp4
  • 19. Characteristics of Chemical Bonds-Electrical Conductivity-.mp4
  • 20. Metallic Bond.mp4
  • 21. Electrical and Heat Conductivity of Metals.mp4
  • 1. Concept of Mole-.mp4
  • 2. Concept of Mole-.mp4
  • 3. Determining Molecular Mass.mp4
  • 4. Determining mole and atom number.mp4
  • 5. Molar Volume of Gas.mp4
  • 6. Mathematical Problems Related to Molar Volume of gas.mp4
  • 7. Mole and Molecular Gas.mp4
  • 8. Molar Solution, Molarity-.mp4
  • 9. Mathematical Problems Related to Molarity-.mp4
  • 10. Mathematical Problems Related to Molarity-.mp4
  • 11. The Percentage Composition of Elements in Compounds.mp4
  • 12. Empirical Formula.mp4
  • 13. Determination of Empirical Formula from the percent Composition.mp4
  • 14. Molecular Formula-.mp4
  • 15. Determining Molecular Formula from Percentage Composition.mp4
  • 16. Empirical Vs Molecular Formula, Determining Empirical Formula from molecular formula.mp4
  • 17. Chemical Reaction, Equation and Balancing.mp4
  • 18. Chemical Equation Related Mathematical Problems.mp4
  • 19. Limiting Reactant and Determination of it.mp4
  • 20. Calculating Percentage of Yield.mp4
  • 1. Physical Change and its example.mp4
  • 2. Chemical Change.mp4
  • 3. Classification of Chemical Reaction depending on direction of reaction.mp4
  • 4. Classification of Chemical Reaction depending on Heat Changes of Reaction.mp4
  • 5. Classification of Chemical Reaction depending on Electron Transfer-Redox Chemical Reaction.mp4
  • 6. Oxidation Reduction Reaction Occur Simultaneously-.mp4
  • 7. Oxidation Number.mp4
  • 8. Finding Oxidation Number of an element in a compound.mp4
  • 9. Finding Oxidation Number of an element in a compound.mp4
  • 10. Difference between Valency and Oxidation Number.mp4
  • 11. Oxidation and Reduction is a simultaneous process.mp4
  • 12. Redox Chemical Reaction-Addition and Synthesis Reaction.mp4
  • 13. Redox Chemical Reaction-Decomposition Reaction.mp4
  • 14. Redox Chemical Reaction-Substitution Reaction.mp4
  • 15. Redox Chemical Reaction-Combustion Reaction.mp4
  • 21. Use of Chemical Reaction in Real Life.mp4
  • 16. Acid and Base.mp4
  • 17. Non-Redox Chemical Reaction-Neutralization Reaction.mp4
  • 18. Non-Redox Chemical Reaction-Precipitation Reaction.mp4
  • 19. Special Type of Chemical Reaction-Hydration and Hydrolysis Reaction.mp4
  • 20. Special Type of Chemical Reaction-Isomerization and Polymerization Reaction.mp4
  • 22. Prevention of Harmful Chemical Reaction.mp4
  • 23. Rate of Reaction.mp4
  • 24. Le Chatelier’s Formula.mp4
  • 25. Effect of Heat on the equilibrium of a reversible reaction.mp4
  • 26. Effect of pressure on the equilibrium of a reversible reaction.mp4
  • 27. Effect of concentration on the equilibrium of a reversible reaction.mp4
  • 1. Intermolecular Energy.mp4
  • 2. Bond Energy, Unit of measurement of Energy.mp4
  • 3. Exothermic and Endothermic Reaction.mp4
  • 4. Heat Energy and Bond Breaking-.mp4
  • 5. Calculating Heat Change in a reaction.mp4
  • 6. Electrolytic and Galvanic Cells, Conductor and Electric Conductors.mp4
  • 7. Electrolyte, Electrode.mp4
  • 8. Electrolysis of Molten NaCl.mp4
  • 9. Factors Controlling the pattern of Cation and Anion being Chargeless.mp4
  • 10. Electrolysis of Concentrated NaCl.mp4
  • 11. Electrolysis of Pure Water.mp4
  • 12. Silver Coating of Iron.mp4
  • 17. Nuclear Fission and Fusion Reaction.mp4
  • 13. Galvanic Cell (Daniel Cell).mp4
  • 14. Dry Cell, Electrode in Galvanic Cell.mp4
  • 15. Difference Between Electrolytic and Galvanic Cell.mp4
  • 16. Nuclear Reaction and Generation of Electricity.mp4
  • 5. Concept of PH.mp4
  • 1. Acids, Concentrated and Diluted Acid.mp4
  • 2. Properties and Reaction of Acid.mp4
  • 3. Base or Alkali and Properties of Base or Alkali.mp4
  • 4. Reaction of bases.mp4
  • 9. How to remove hardness of water.mp4
  • 10. Water Pollution, BOD, COD.mp4
  • 6. Measurement of PH, PH inside the body.mp4
  • 7. Neutralization Reaction, Acid Rain.mp4
  • 8. Hardness of Water, Types of Hardness of Water.mp4
  • 5. Metal Extraction Step by Step- Conversion of metallic oxides to free oxides.mp4
  • 1. Earth’s Crust, Rock, Mineral and Ores.mp4
  • 2. Metal Extraction Step by Step-Condensation of Ores (Hydrolytic, Froth Floatation and Magnetic Separation Procedure).mp4
  • 3. Metal Extraction Step by Step-Condensation of Ores (Chemical Method).mp4
  • 4. Metal Extraction Step by Step- Conversion of Condensed Ores to Oxides.mp4
  • 11. Copper Extraction.mp4
  • 6. Reduction By Electrolysis.mp4
  • 7. Carbon Reduction Method.mp4
  • 8. Iron and Lead Extraction by Carbon Reduction Method.mp4
  • 9. Auto Reduction,Smelting.mp4
  • 10. Copper Extraction.mp4
  • 15. Production and Properties of Sulfuric Acid.mp4
  • 12. Purification of Copper by Electrolysis.mp4
  • 13. Electroplating.mp4
  • 14. Sulphur Extraction.mp4
  • 17. Corrosion of Metals and their Prevention.mp4
  • 6. Closed Chain Hydrocarbon Structure.mp4
  • 1. Catenation and Carbon tetravalency.mp4
  • 2. Hydrocarbon.mp4
  • 3. Open Chain Hydrocarbon.mp4
  • 4. Sigma Bond and Pi Bond.mp4
  • 5. Closed Chain Hydrocarbon.mp4
  • 16. Metal Alloy, their properties and use.mp4
  • 12. Saturated Hydrocarbon-Alkane.mp4
  • 7. Aromatic Hydrocarbons.mp4
  • 8. Differences between Alicyclic and Aromatic hydrocarbon.mp4
  • 9. Fractional Distillation of Petroleum.mp4
  • 10. Classification of Organic Compounds.mp4
  • 11. Homologous Series.mp4
  • 18. Alkyl Group.mp4
  • 13. Nomenclature of Saturated Hydrocarbon.mp4
  • 14. Preparation of Alkane.mp4
  • 15. Physical and Chemical Properties of Alkane.mp4
  • 16. Chemical Reaction of Alkane-.mp4
  • 17. Chemical Reaction of Alkane-.mp4
  • 4. Toilet Cleaner.mp4
  • 24. Nomenclature of Unsaturated Hydrocarbon-Alkyne.mp4
  • 1. Baking Powder and Baking Soda.mp4
  • 19. Nomenclature of Unsaturated Hydrocarbon-Alkene.mp4
  • 2. Vinegar.mp4
  • 3. Soft Drinks, Washing Powder.mp4
  • 20. Preparation of Alkene.mp4
  • 21. Physical and Chemical Properties of Alkene.mp4
  • 22. Chemical Properties of Alkene.mp4
  • 23. Chemical Properties of Alkene.mp4
  • 5. Soap and Detergent.mp4
  • 6. Cleaning Mechanism of Soap and Detergent.mp4
  • 7. Differences between soap and detergent.mp4
  • 8. Bleaching Powder and cleaning mechanism of it.mp4
  • 9. Glass Cleaner.mp4
  • 10. Ammonia Production.mp4
  • 11. Chemistry in Agriculture and Industry.mp4
  • 28. Preparation of Alcohol.mp4
  • 25. Preparation of Alkyne.mp4
  • 26. Physical and Chemical Properties of Alkyne.mp4
  • 27. Alcohol and Nomenclature of Alcohol.mp4
  • 33. Nomenclature of Fatty Acid.mp4
  • 29. Nomenclature of Aldehyde.mp4
  • 30. Preparation of Aldehyde.mp4
  • 31. Preparation of Aldehyde.mp4
  • 32. Formalin.mp4
  • 38. Addition Polymers and its reaction.mp4
  • 34. Preparation of Fatty Acid.mp4
  • 35. Chemical Properties of Fatty Acid, Vinegar.mp4
  • 36. Preparation of Alcohol, Aldehyde and Fatty Acid from Hydrocarbons.mp4
  • 37. Polymer and its classification.mp4
  • 39. Condensation Polymers and its reaction.mp4
  • 40. Natural Polymers.mp4
  • 41. Difference between Organic and Inorganic Compounds.mp4
  • 42. The Use of Alcohol, Aldehyde and Fatty Acids.mp4
  • ফাইল
  • Chapter 01_ Concept of Chemistry.pdf
  • Chapter 02_ States of Matter.pdf
  • Chapter 03_ Structure of Matter.pdf
  • Chapter 04_ Periodic Table.pdf
  • Chapter 05_ Chemical Bond.pdf
  • Chapter 06_ Concept of Mole and Chemical Counting.pdf
  • Chapter 07_ Chemical Reaction.pdf
  • Chapter 08_ Chemistry and Energy.pdf
  • Chapter 09_ Acid Base Balance.pdf
  • Chapter 10_ Mineral Resources Metal and Non-Metal.pdf
  • Chapter 11_ Mineral Resources Fossils.pdf
  • Chapter 12_ Chemistry in Our Lives.pdf

  • লেকচার
  • 1. Rising Stage of Science.mp4
  • 2. Introduction to Modern Science.mp4
  • 3. Contemporary Physics.mp4
  • 4. Physical Quantities and Measurements, Multiples and Submultiples used in SI Units.mp4
  • 5. Measuring Instrument.mp4
  • 6. Mathematical Problem.mp4
  • 1. Learning of the Chapter.mp4
  • 2. Frame of Reference, Rest and Motion.mp4
  • 3. Linear Motion.mp4
  • 4. Circular Motion.mp4
  • 5. Periodic Motion.mp4
  • 6. Distance and Displacement.mp4
  • 7. Speed and Velocity.mp4
  • 8. Speed and Velocity related question.mp4
  • 9. Mathematical Problems Related to Speed.mp4
  • 10. Distance Vs Time Graph.mp4
  • 11. Acceleration.mp4
  • 12. Mathematical Problems Related to Acceleration.mp4
  • 13. Velocity Vs Time Graph.mp4
  • 14. SUVAT Equation.mp4
  • 15. SUVAT Equation Based Mathematical Problems Related to Motion.mp4
  • 16. Galileo’s Falling Body Laws.mp4
  • 17. Mathematical Problem-Calculation of Acceleration by SUVAT Equation.mp4
  • 18.Mathematical Problem- Calculation of Deacceleration by SUVAT Equation.mp4
  • 19. Mathematical Problem- Free Falling Bodies Related Mathematical Problem.mp4
  • 1. Newton’s First Law of Motion.mp4
  • 2. Force.mp4
  • 3. Fundamental Forces-Gravitational Force.mp4
  • 4. Fundamental Forces-Electromagnetic Force, Strong and Weak Nuclear Force.mp4
  • 20. Mathematical Problem- Stem based Mathematical Problem.mp4
  • 21. Mathematical Problem- Stem based Mathematical Problem.mp4
  • 22. Mathematical Problem- Stem based Mathematical Problem.mp4
  • 23. Mathematical Problem- Stem based Mathematical Problem.mp4
  • 24. Mathematical Problem- Stem based Mathematical Problem.mp4
  • 5. Momentum.mp4
  • 6. Conservation Law of Momentum.mp4
  • 7. Newton’s Second Law.mp4
  • 8. Mathematical Problems Related to Newton’s 2nd Law.mp4
  • 9. Newton’s Third Law of Motion.mp4
  • 10. Frictional Force.mp4
  • 11. Example of Frictional Force, Types of Friction.mp4
  • 12. Friction is a necessary evil.mp4
  • 13. Mathematical Problem- Stem based Mathematical Problem.mp4
  • 14. Mathematical Problem- Calculation of Velocity.mp4
  • 15. Mathematical Problem- Calculation of Force.mp4
  • 16. Mathematical Problem- Calculation of Time to stop an object which was in motion in a specific force.mp4
  • 17. Mathematical Problem- Calculation of Force.mp4
  • 18. Mathematical Problem- Calculation of Frictional Force.mp4
  • 19. Mathematical Problem- Calculation of Backward Velocity.mp4
  • 20. Mathematical Problem- Conservation Principle of momentum.mp4
  • 21. Mathematical Problem- Stem based Mathematical Problem(1).mp4
  • 22. Mathematical Problem- Stem based Mathematical Problem(1).mp4
  • 1. Work and Example of it.mp4
  • 2. Mathematical Problem- Calculation of Work-.mp4
  • 3. Energy and Example of it.mp4
  • 4. Mathematical Problem- Calculation of Work-.mp4
  • 5. Kinetic Energy.mp4
  • 6. Mathematical Problem- Calculation of Kinetic Energy.mp4
  • 7. Potential Energy, Gravitational Potential Energy.mp4
  • 8. Conservation of Energy, Power, Efficiency.mp4
  • 9. Mathematical Problem- Stem based Mathematical Problem.mp4
  • 10. Mathematical Problem- Stem based Mathematical Problem.mp4
  • 11. Mathematical Problem- Stem based Mathematical Problem.mp4
  • 12. Mathematical Problem- Stem based Mathematical Problem.mp4
  • 13. Mathematical Problem- Stem based Mathematical Problem(1).mp4
  • 14. Mathematical Problem- Stem based Mathematical Problem.mp4
  • 15. Mathematical Problem- Stem based Mathematical Problem.mp4
  • 16.Mathematical Problem- Stem based Mathematical Problem.mp4
  • 1. Pressure.mp4
  • 2. Mathematical Problem- Pressure Related Mathematical Problem.mp4
  • 3. Density.mp4
  • 4. Mathematical Problem- Density Related Mathematical Problem.mp4
  • 5. Pressure in Liquids.mp4
  • 6. Mathematical Problem- Pressure in Liquid Related Mathematical Problem.mp4
  • 7. Archimedes’s Principle.mp4
  • 8. Pascal’s Law.mp4
  • 9. Elasticity, Strain, Stress, Hook’s Law.mp4
  • 10. Mathematical Problem- Stem based Mathematical Problem(1).mp4
  • 11. Mathematical Problem- Stem based Mathematical Problem(1).mp4
  • 12. Mathematical Problem- Stem based Mathematical Problem(1).mp4
  • 13. Mathematical Problem- Stem based Mathematical Problem(2).mp4
  • 14. Mathematical Problem- Stem based Mathematical Problem(1).mp4
  • 1. Simple Harmonic Motion, Wave and Properties of it.mp4
  • 2. Types of Wave.mp4
  • 3. Relation between Velocity, frequency and wavelength.mp4
  • 4. Sound Wave and properties of it, Mathematical Problem Related to the velocity of sound wave.mp4
  • 5. Echo.mp4
  • 6. Variation of Velocity of Sound, Mathematical Problem Related to the velocity.mp4
  • 7. Mathematical Problem- Stem based Mathematical Problem.mp4
  • 8. Mathematical Problem- Stem based Mathematical Problem.mp4
  • 9. Mathematical Problem- Stem based Mathematical Problem(1).mp4
  • 10. Mathematical Problem- Stem based Mathematical Problem(2).mp4
  • 11. Mathematical Problem- Stem based Mathematical Problem(2).mp4
  • 12. Mathematical Problem- Stem based Mathematical Problem(2).mp4
  • 1. Nature of Light, Reflection of Light.mp4
  • 2. Laws of Reflection.mp4
  • 3. Reflection from Smooth and Rough Surface, Mirror Image.mp4
  • 4. Convex and Concave Sphere.mp4
  • 5. Convex Mirror.mp4
  • 6. Convex Mirror Image.mp4
  • 7. Characteristic of Convex Mirror, Concave Mirror Image.mp4
  • 8. Mirror Formula.mp4
  • 9. Mathematical Problem- Stem based Mathematical Problem(2).mp4
  • 10. Mathematical Problem- Stem based Mathematical Problem(3).mp4
  • 11. Mathematical Problem- Stem based Mathematical Problem(3).mp4
  • 1. Electricity, Potential Difference.mp4
  • 2. Conductor, Semiconductor and Insulator.mp4
  • 3. Direction of Electric Flow, Relationship between Potential Difference and Electricity.mp4
  • 4. Resistance.mp4
  • 5. Simple Circuit, Types of Circuit.mp4
  • 6. Electric Power, Electrical Supply.mp4
  • 7. Mathematical Problem- Stem based Mathematical Problem(1).mp4
  • 8. Mathematical Problem- Stem based Mathematical Problem(1).mp4
  • 9. Mathematical Problem- Stem based Mathematical Problem(3).mp4
  • 10. Mathematical Problem- Stem based Mathematical Problem(4).mp4
  • 11. Mathematical Problem- Stem based Mathematical Problem(4).mp4
  • 12. Mathematical Problem- Stem based Mathematical Problem(3).mp4
  • 1. Hear and Temperature, Internal Energy-.mp4
  • 2. Measurement of Temperature.mp4
  • 3. Mathematical Problems related to Measurement of Temperature.mp4
  • 4. Thermal Properties of matter- linear, area and volume expansion.mp4
  • 5. Mathematical Problems related to Linear Expansion Coefficient.mp4
  • 6. Real and Apparent Expansion, Specific Heat , Calorimetry.mp4
  • 7. Mathematical Problems related to Calorimetry.mp4
  • 8. Creative Question Solution.mp4
  • 9. Creative Question Solution.mp4
  • 10. Creative Question Solution.mp4
  • 11. Creative Question Solution.mp4
  • 12. Creative Question Solution.mp4
  • 6. Image Formation in Convex Lens, Power of Lens.mp4
  • 1. Refraction.mp4
  • 2. Refractive Index, Laws of Refraction.mp4
  • 3. Mathematical Problems Related to Refraction.mp4
  • 4. Total Internal Reflection and Use of it .mp4
  • 5. Types of Lens, Image Formation in Concave Lens.mp4
  • 7. Creative Question Solution.mp4
  • 8. Creative Question Solution.mp4
  • 9. Creative Question Solution.mp4
  • 10. Creative Question Solution.mp4
  • 11. Creative Question Solution.mp4
  • 1. Charge-.mp4
  • 2. Static Electricity By Friction.mp4
  • 3. Electric Induction.mp4
  • 4. Electroscope.mp4
  • 5. Electric Force, Coulomb’s law and Mathematical Problems Related Part to it .mp4
  • 6. Electric Field and mathematical problem related to it .mp4
  • 7. Electric Potential.mp4
  • 8. Capacitor, USe of Static Electricity.mp4
  • 9. Creative Question Solution.mp4
  • 10. Creative Question Solution.mp4
  • 11. Creative Question Solution.mp4
  • 12. Creative Question Solution.mp4
  • 13. Creative Question Solution.mp4
  • 5. Faraday’s Law of Induction, Generator, Transformer.mp4
  • 1. Magnet, Magnetic Effect of Current-.mp4
  • 2. Right hand Thumb Rule, Solenoid.mp4
  • 3. Electromagnet, Effect of Magnet on Current Carrying Conductor.mp4
  • 4. DC Motor, Electromagnetic Induction.mp4
  • 4. development of Electronics, transistor.mp4
  • 1. Radioactivity.mp4
  • 2. Alpha, Beta and Gamma Decay.mp4
  • 3. half life, use of radioactivity.mp4
  • 6. Creative Question Solution 1.mp4
  • 7. Creative Question Solution.mp4
  • 8. Creative Question Solution.mp4
  • 9. Creative Question Solution.mp4
  • 10. Creative Question Solution.mp4
  • 5. Analog and Digital Electronics.mp4
  • 6. Semiconductor.mp4
  • 7. Diode.mp4
  • 8. Information and Communication Technology related components.mp4
  • 1. X-Ray, Working Principle of X-Ray and Use of it-.mp4
  • 2. Ultrasonography and use of it.mp4
  • 3. CT Scan and Procedure of Performing it .mp4
  • 4. MRI, Angiography, Endoscopy, ECG.mp4
  • ফাইল

  • লেকচার
  • 1. Article and types of Article.mp4
  • 2. Definite and Indefinite Article.mp4
  • 3. Rules and Examples of Article.mp4
  • 4. Rules and Examples of Article.mp4
  • 5. Exercise on Article.mp4
  • 6. Rules and Example of Article.mp4
  • 7. Exercises on Article.mp4
  • 1. What is Preposition.mp4
  • 2. Rules and Examples of Preposition.mp4
  • 3. Rules and Examples of Preposition.mp4
  • 4. Rules and Examples of Preposition.mp4
  • 5. Types of Preposition- Simple and Double Preposition.mp4
  • 6. Types of Preposition- Compound and Phrase Preposition.mp4
  • 7. Types of Preposition- Participle Preposition and Disguised Preposition.mp4
  • 8. Preposition of Movement.mp4
  • 9. Preposition of Place.mp4
  • 10. Preposition of Time, Place, Position, Direction.mp4
  • 11. Exercise.mp4
  • 1. Pronoun and Types of it-.mp4
  • 2. Personal Pronoun and Use of it-.mp4
  • 3. Possessive Pronoun and Use of it-.mp4
  • 4. Some Special Rules.mp4
  • 5. Exercises.mp4
  • 6. Demonstrative Pronoun, Indefinite and Distributive Pronoun.mp4
  • 7. Relative Pronoun, Reflexive Pronoun, Emphatic Pronoun.mp4
  • 8. Interrogative Pronoun, Reciprocal Pronoun.mp4
  • 9. Rules and Example of Pronoun.mp4
  • 10. Rules and Exercise.mp4
  • 1. Rules.mp4
  • 2. Rules.mp4
  • 3. Exercises.mp4
  • 1. Adjective, Linking Verbs, Comparative and Superlative Form of Adjective.mp4
  • 2. Adverbs, Difference Between Adjective and Adverbs.mp4
  • 3. Adjective and Adverb form of words, Modern Adverb.mp4
  • 4. Exercises-.mp4
  • 1. Subject Verb Agreement.mp4
  • 2. Rules of Subject Verb Agreement.mp4
  • 3. Rules of Subject Verb Agreement.mp4
  • 4. Rules of Subject Verb Agreement.mp4
  • 5. Exercises of Subject Verb Agreement.mp4
  • 6. Rules of Subject Verb Agreement.mp4
  • 7. Rules of Subject Verb Agreement.mp4
  • 8. Rules of Subject Verb Agreement.mp4
  • 9. Rules of Subject Verb Agreement.mp4
  • 10. Rules of Subject Verb Agreement.mp4
  • 11. Exercises of Subject Verb Agreement.mp4
  • 1. Rules and Example of Transformation of Sentences.mp4
  • 1. Degree of Comparison-Positive, Comparative and Superlative.mp4
  • 2. Rules and Example of Degree of Comparison.mp4
  • 3. Rules and Example of Degree of Comparison.mp4
  • 4. Exercise of Transformation of Assertive into Interrogative Sentence.mp4
  • 1. Rules of Transformation of Affirmative and Negative Sentence.mp4
  • 2. Rules of Transformation of Affirmative and Negative Sentence.mp4
  • 3. Rules of Transformation of Affirmative and Negative Sentence.mp4
  • 4. Some Exceptional Rules, Exercises-.mp4
  • 5. Rules of Transformation of Assertive into Interrogative Sentence.mp4
  • 6. Rules of Transformation of Assertive into Interrogative Sentence.mp4
  • 7. Rules and Exercise of Transformation of Assertive into Interrogative Sentence.mp4
  • 8. Exercise of Transformation of Interrogative into Assertive Sentence.mp4
  • 9. Rules and Exercise of Transformation of Assertive into Imperative Sentence and Vice versa.mp4
  • 1. Active and Passive Voice.mp4
  • 2. Formation of Passive Voice using auxiliary verb “Be”.mp4
  • 3. Verb tenses used in active and passive voice.mp4
  • 4. Exercises.mp4
  • 5. Rules of Mentioning Agent and example of it-.mp4
  • 6. Change of voice depending on verb-.mp4
  • 7. Additional Rules with Example.mp4
  • 8. Exercises-.mp4
  • 1. Direct and Indirect Speech.mp4
  • 2. Rules for Changing Speech.mp4
  • 3. Rules for Changing Speech.mp4
  • 4. Rules and Exercise for Changing Speech.mp4
  • 5. Rules and Exercise for Changing Speech.mp4
  • 6. Rules and Exercise for Changing Speech.mp4
  • 1. Modifiers and Example of Multiple added Modifiers.mp4
  • 2. Exercise on Modifiers.mp4
  • 3. Types of Modifies- Premodifiers.mp4
  • 4. Types of Modifies- Postmodifiers.mp4
  • 5.Exercise on Modifiers.mp4
  • 6. Dangling Modifiers.mp4
  • 7. Limiting Modifiers, Squinting Modifiers, Non-Participial Modifiers.mp4
  • 8. Exercises on Modifiers.mp4
  • 9. Pre-modifying the noun.mp4
  • 10. Pre-modifying the noun using noun adjectives.mp4
  • 11. Post modifying with Appositives, Premodifying the noun using Demonstrative, Post modifying using Adverbs or Adverbials.mp4
  • 12. Types of Adverbs.mp4
  • 13. Post Modifying verb with an infinitive and participle.mp4
  • 14. Pre modifying adjective with an Intensifier and Demonstrative.mp4
  • 1. Co-ordinating Conjunctions.mp4
  • 2. Co-ordinating Conjunction-For,And,Nor,But,Or,Yet,So (FANBOYS).mp4
  • 3. Example of For,And,Nor,But,Or,Yet,So (FANBOYS).mp4
  • 4. Co ordinating Conjunction.mp4
  • 5. Correlative and Subordinating Conjunction.mp4
  • 6. Conjunction and its example.mp4
  • 7. When to Use conjunction and when to use connector, Exercise.mp4
  • 8. Rules and Example.mp4
  • 9. Rules and Exercise.mp4
  • 10. Rules and Example.mp4
  • 11. Rules and Exercise.mp4
  • 12. Sentence Connectors and Example.mp4
  • 13. Rules and Example.mp4
  • 14. Rules and Example.mp4
  • 15. Rules and Example.mp4
  • 15. Pre modifying the noun using possessive-.mp4
  • 16. post modifying the verb using prepositional phrases, pre modifying the noun using a determiner.mp4
  • 17. post modifying the noun using adjective clauses.mp4
  • 18. Exercises.mp4
  • 19. Exercises.mp4
  • 1. Exercise on Right Form of Verbs.mp4
  • 2. Exercise on Right Form of Verbs.mp4
  • 1. Tag Question, Structure of Tag Question.mp4
  • 1. Synonym, Antonym, How to form Antonym.mp4
  • 2. Exercises.mp4
  • 3. Important synonym and antonym of words.mp4
  • 4. Exercises.mp4
  • 5. Exercise.mp4
  • 6. Exercises.mp4
  • 7. Exercises.mp4
  • 1. Zero Conditional and its example.mp4
  • 2. First Conditional and its example.mp4
  • 3. Second Conditional and its example.mp4
  • 4. Third Conditional and its example.mp4
  • 5. Rules of Complete the sentence.mp4
  • 6. Rules of Complete the sentence.mp4
  • 7. Rules of Complete the sentence.mp4
  • 8. Rules of Complete the sentence.mp4
  • 1. Rules with Noun-.mp4
  • 2. Rules with Adjective.mp4
  • 3. Rules with Adverb.mp4
  • 1. Rules.mp4
  • 2. Rules.mp4
  • 3. Rules.mp4
  • 4. Exercise.mp4
  • 1. Good Writing Skill and Ways of it.mp4
  • 2.Trick of Good Writing Skill -Attention Grabbing beginning.mp4
  • 3. 5 Important tips for good writing skill.mp4
  • 4. Planning and Organizing for Writing.mp4
  • 1. Types of Letter, Informal Letter Writing.mp4
  • 2. Format of Informal Letter, Rules of Informal Letter.mp4
  • 3. Example of Informal letter.mp4
  • 4. Use of Words in Formal and Informal Letters.mp4
  • 5. Use of Words in Formal and Informal Letters.mp4
  • 6. Rules of Informal Letter Writing.mp4
  • 7. Rules of Informal Letter Writing.mp4
  • 8. Exercise of Informal Letter Writing.mp4
  • 9. Rules of formal Letter Writing.mp4
  • 10. Rules of formal Letter Writing.mp4
  • 11. Rules and Exercise of formal Letter Writing.mp4
  • 12. Comparison between formal and Informal Letters.mp4
  • 13. Formal and Informal letter Format.mp4
  • 1. Suggestion on Paragraph Writing.mp4
  • 2. Paragraph on “Mujib Borsho”.mp4
  • 3. Paragraph on “Diaspora”.mp4
  • 4. Paragraph on “Drug Addiction”.mp4
  • 5. Paragraph on “Environment Pollution”.mp4
  • 6. Paragraph on “Gender Discrimination”.mp4
  • 1. Report Writing and types of it.mp4
  • 2. Requirements of a Report.mp4
  • 3. Structure of a Report Writing-.mp4
  • 4. Exercise of Report Writing.mp4
  • 1. What is an E-mail and How to send an E-mail.mp4
  • 2. Some Sample Sentences for writing an E-mail.mp4
  • 3. Some Sample Sentences for writing an E-mail.mp4
  • 4. Format of Writing an E-mail.mp4
  • 1. How to write a CV.mp4
  • 1. Fill in the blanks with clues.mp4
  • 2. Fill in the blanks with suitable words, Matching.mp4
  • 3. Right form of Verbs, Narration.mp4
  • 4. Transformation, Completing the sentences with suitable words or phrases.mp4
  • 5. Suffix or Prefix, Tag Question.mp4
  • 6. Connectors, Punctuation-.mp4
  • 7. Writing Part.mp4
  • 2. Types of Tag Question, Rules and Example of Tag Question.mp4
  • 3. Rules and Example of Tag Question.mp4
  • 4. Exercises on Tag Question.mp4
  • 5. Rules and Example of Tag Question.mp4
  • 6. Rules and Example of Tag Question.mp4
  • 7. Rules and Example of Tag Question.mp4
  • 2. Rules and Example of Transformation of Sentences.mp4
  • 3. Rules and Example of Transformation of Sentences.mp4
  • 4. Rules and Example of Transformation of Sentences.mp4
  • ফাইল

  • লেকচার
  • 1. Variables and Constants.mp4
  • 2. Polynomials.mp4
  • 3. Expression of Polynomials.mp4
  • 4. Polynomials of two variables.mp4
  • 5. Polynomials of three variables.mp4
  • 6. Multiplication of Polynomials.mp4
  • 7. Division of Polynomials.mp4
  • 8. Remainder Theorem and example of it.mp4
  • 9. Factor Theorem and example of it.mp4
  • 10. Converse of Factor Theorem and example of it.mp4
  • 11. Mathematical Problem - Resolving into Factor.mp4
  • 12. Homogenous, Symmetric and Cyclic Expressions.mp4
  • 13. Resolving into factors of Cyclic Polynomials.mp4
  • 14. Short Cut method of resolving into factors of cyclic polynomials.mp4
  • 15. Resolving into factors of Cyclic Polynomials.mp4
  • 16. Resolving into factors of Cyclic Polynomials.mp4
  • 17. An important algebraic equation.mp4
  • 18. Corollary.mp4
  • 19. Rational Fractions and Examples of it.mp4
  • 20. Rational Fractions and Examples of it.mp4
  • 21. Rational Fractions and Examples of it.mp4
  • 22. Partial Fraction (Type-1).mp4
  • 23. Partial Fraction (Type-2).mp4
  • 24. Partial Fraction (Type-3).mp4
  • 25. Partial Fraction (Type-4).mp4
  • 26. Partial Fraction (Type-5).mp4
  • 27. Problem Solution of Exercise.mp4
  • 28. Resolving into factors (Exercise Problems).mp4
  • 29. Resolving into factors (Exercise Problems).mp4
  • 30. Problem Solution of Exercise.mp4
  • 31. Problem Solution of Exercise.mp4
  • 32. Partial Fraction (Exercise Problems).mp4
  • 33. Problem Solution of Exercise.mp4
  • 34. Problem Solution of Exercise.mp4
  • 11. Solution of Exercise Problems.mp4
  • 10. Solution of Exercise Problems.mp4
  • 6. Determination of Relation between the sides of a triangle and the median by the theorem of Apollonius.mp4
  • 7. Soultion of Exercise Problem.mp4
  • 8. Solution of Exercise Problems.mp4
  • 9. Solution of Exercise Problems.mp4
  • 1. Theorem of Pythagoras.mp4
  • 2. Orthogonal Projection.mp4
  • 3. Some important theorem.mp4
  • 4. Some Important Theorem.mp4
  • 5. Theorem of Apollonius.mp4
  • 1. Circumcenter, Orthocenter,Centroid.mp4
  • 2. Some important theorem.mp4
  • 3. Theorem of Bramhagupta.mp4
  • 4. Theorem of Ptolemy.mp4
  • 5. Solution of Exercise Problems.mp4
  • 6. Solution of Exercise Problems.mp4
  • 7. Solution of Exercise Problems.mp4
  • 8. Solution of Exercise Problems.mp4
  • 9. Solution of Exercise Problems.mp4
  • 10. Solution of Exercise Problems.mp4
  • 11. Solution of exercise problem.mp4
  • 1. Sequence, Series, Types of Series-.mp4
  • 2. Infinite Series, Sum of Infinite Series.mp4
  • 3. Sum of Infinite Geometric Series.mp4
  • 4. Transformation of Repeating or Recurring Decimals in Rational Fractions.mp4
  • 5. Transformation of Repeating or Recurring Decimals in Rational Fractions.mp4
  • 6. Creative Question Solution of Example.mp4
  • 7. Finding specific terms of given sequence (Exercise Problem).mp4
  • 8. Finding nth term of given sequence (Exercise Problem).mp4
  • 9. Finding the sum of given series (up to infinity) if exists.mp4
  • 10. Finding the sum of first n terms of the given series-.mp4
  • 11. Mathematical Problem Solving of Exercise.mp4
  • 12. Solution of Creative Question of Chapters.mp4
  • 13. Solution of Creative Question of Chapters.mp4
  • 1. Difference between geometric and trigonometric angle.mp4
  • 2. Positive and Negative Angle.mp4
  • 3. Mathematical Problem-Finding the Quadrant of given angle.mp4
  • 4. Mathematical Problem-Finding the Quadrant of given angle.mp4
  • 5. Measurement of Angles.mp4
  • 6. Proposition 1- In any two circles the ratio of the circumference and the respective diameters are equal.mp4
  • 7. Proposition 2- The Centered angle produced by an arc of a circle its proportional to its arc.mp4
  • 8. Proposition 3- Radian is a constant angle.mp4
  • 9. Proposition 4- Any arc of length s produces an angle in the center of the circle with radius then s = radius × angle.mp4
  • 10. Relation Between Radian and Degree Measurement.mp4
  • 11. Mathematical Problem- Express the given degree into radian.mp4
  • 12. Mathematical Problem- Express the given radian into degree.mp4
  • 13. Mathematical Problem.mp4
  • 14. Mathematical Problem.mp4
  • 15. Mathematical Problem.mp4
  • 16. Mathematical Problem.mp4
  • 17. Mathematical Problem.mp4
  • 1. Trigonometric Ratio of Acute Angle.mp4
  • 2. Some Identities.mp4
  • 3. Signs of Trigonometric Ratios in different quadrants.mp4
  • 4. Signs of Trigonometric Ratios in different quadrants.mp4
  • 5. Mathematical Problem- Finding the Value of Given trigonometric expression.mp4
  • 6. Mathematical Problem- Proving the Identities.mp4
  • 7. Mathematical Problem- Proving the Identities.mp4
  • 8. Mathematical Problem- Proving the Identities.mp4
  • 9. Mathematical Problem of Exercise.mp4
  • 10. Mathematical Problem of Exercise.mp4
  • 11. Mathematical Problem- Finding the Value of given trigonometric expression.mp4
  • 12. Mathematical Problem- Simplifying the given trigonometric expression.mp4
  • 1. Trigonometric Ratios of various negative angles.mp4
  • 2. Example of Trigonometric Ratios of various negative angles.mp4
  • 3. Trigonometric Ratios of various angles and their example.mp4
  • 4. Trigonometric Ratios of various angles.mp4
  • 5. Example of Various angles.mp4
  • 6. Trigonometric Ratios of various angles and their example.mp4
  • 7. Trigonometric Ratios of various angles.mp4
  • 8. Example of Trigonometric Ratios of Various angles.mp4
  • 9. Example of Trigonometric Ratios of Various angles.mp4
  • 10. Example Math Problem Solution.mp4
  • 11. Example Math Problem Solution.mp4
  • 12. Example Math Problem Solution.mp4
  • 13. Math Problems of Exercise.mp4
  • 14. Math Problems of Exercise.mp4
  • 15. Math Problems of Exercise.mp4
  • 16. Creative Question of the exercise.mp4
  • 17. Creative Question of the exercise.mp4
  • 18. Math Problems of Exercise.mp4
  • 19. Math Problems of Exercise.mp4
  • 1. Formulas of Exponent.mp4
  • 2. Formulas and definitions of Exponent.mp4
  • 3. Expalanation of the roots.mp4
  • 4. Rational fractional exponent.mp4
  • 5. Problem Solving of Exponents of Exercise.mp4
  • 6. Problem Solving of Exponents of Exercise.mp4
  • 7. Problem Solving of Exponents of Exercise.mp4
  • 8. Problem Solving of Exponents of Exercise.mp4
  • 9. Problem Solving of Exponents of Exercise.mp4
  • 10. Problem Solving of Exponents of Exercise.mp4
  • 11. Problem Solving of Exponents of Exercise.mp4
  • 12. Problem Solving of Exponents of Exercise.mp4
  • 13. Formulas of Logarithms.mp4
  • 14. Mathematical Problems from Example.mp4
  • 15. Problem Solving of Logarithms of Exercise.mp4
  • 16. Problem Solving of Logarithms of Exercise.mp4
  • 17. Problem Solving of Logarithms of Exercise.mp4
  • 18. Graphs of Function.mp4
  • 19. Graphs of Function.mp4
  • 20. Graphs of Function.mp4
  • 21. Graphs of Function.mp4
  • 22. Graphs of Function.mp4
  • 23. Graphs of Function.mp4
  • 24. Creative Question of the chapter.mp4
  • 1. Number of Terms in a binomial expansion.mp4
  • 2. Properties of Binomial Expansion.mp4
  • 3. Finding Coefficient of terms in Binomial Expansion Using Pascal’s Triangle.mp4
  • 4. Example of Binomial Expansion Using Pascal’s Triangle.mp4
  • 5. Finding Coefficient of terms in Binomial Expansion Using another method.mp4
  • 6. Example of Finding Coefficient of terms Binomial Expansion Using another method.mp4
  • 7. General Term of Binomial Expansion.mp4
  • 8. Exercise Problems (Finding the binomial expansion of a given term).mp4
  • 9. Exercise Problems.mp4
  • 10. Exercise Problems.mp4
  • 11. Exercise Problems.mp4
  • 12. Exercise Problems.mp4
  • 13. Exercise Problems.mp4
  • 14. Exercise Problems.mp4
  • 1. The co-ordinate system.mp4
  • 2. The co-ordinate system.mp4
  • 3. Distance between two points.mp4
  • 4. Example of distance between two points.mp4
  • 5. Exercise Problem.mp4
  • 6. Exercise Problem.mp4
  • 7. Exercise Problem.mp4
  • 1. Finding the area of triangle and example of it.mp4
  • 2. Finding the area of triangle by using general formula and example of it.mp4
  • 3. Example of finding area of triangle.mp4
  • 4. Finding the area of Quadrilateral and example of it.mp4
  • 5. Exercise Problem.mp4
  • 6. Exercise Problem.mp4
  • 7. Exercise Problem.mp4
  • 1. Gradient or Slope of a line.mp4
  • 2. Example of Finding Gradient.mp4
  • 3. Example of Finding Gradient.mp4
  • 4. Exercise Problem.mp4
  • 5. Exercise Problem.mp4
  • 1. Equation of Straight line.mp4
  • 2. Graphs of Straight line.mp4
  • 3. Exercise Problem.mp4
  • 4. Exercise Problem.mp4
  • 5. Exercise Problem.mp4
  • 6. Creative Question of Exercise.mp4
  • 7. Creative Question of Exercise.mp4
  • 1. Random Experiment, Event.mp4
  • 2. Equally likely Events, Mutually Exclusive Events, Favourable Outcome.mp4
  • 3. Sample Space, Sample Point.mp4
  • 4. Certain and Impossible Event.mp4
  • 5. Probability Tree and example of it.mp4
  • 6. Example of Probability Tree.mp4
  • 7. Example Problems.mp4
  • 8. Exercise Problems.mp4
  • 9. Exercise Problems.mp4
  • 10. Exercise Problems.mp4
  • 11. Exercise Problems.mp4
  • 12. Exercise Problems.mp4
  • 13. Exercise Problems.mp4
  • ফাইল

Instructor's profile

Aniruddha Saha

Aniruddha Saha

Lecturer

2 কোর্স সমূহ 17 পরীক্ষা সমূহ

Azra Khan Sharmila

Azra Khan Sharmila

Lecturer

1 কোর্স সমূহ 0 পরীক্ষা সমূহ

Maliha Binte Monsur

Maliha Binte Monsur

Lecturer

2 কোর্স সমূহ 26 পরীক্ষা সমূহ

Sadia Islam Promi

Sadia Islam Promi

Lecturer

3 কোর্স সমূহ 0 পরীক্ষা সমূহ

Amit Paul

Amit Paul

Lecturer

1 কোর্স সমূহ 0 পরীক্ষা সমূহ

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