Academic · Class 9
Biology
What you get
- Every textbook chapter, each section its own lesson
- Explained step by step in plain Bangla, like a tutor
- See the living world in real photos and micrographs
- Turn 3D models with your finger and see them from every side
- Questions mid-lesson and a quiz at the end, checked instantly
- Watch on phone or computer, from anywhere
- 14 chapters
- 91 lessons
- Free demo lessons
- Follows the textbook
What the lessons are like
Not videos — science happening in front of you
Every Biology lesson is built from real photos, 3D models you can turn and animation. The inside of a cell, the shape of a microbe, the bodies of plants and animals — you see it all, while a voice explains it in plain Bangla.
- Seen in photos and 3DReal photos, micrographs and 3D models you turn with a finger — understand it instead of memorising it.
- Bangla voice-overStep-by-step explanations in Bangla — hard words made simple.
- At your own pacePause, go back, watch again. It remembers where you stopped.
- Works on a phoneNo app needed — lessons run in the browser on a phone or computer.
- Quizzes as you learnAs soon as a topic ends, a question pops up right on the lesson screen — answer it, see instantly if you're right, then move on to the next topic.
Contents
The whole book, chapter by chapter
Every chapter of the Class 9 Biology textbook, in the book's own order. Chapters still being made say “coming soon” and fill in as their lessons are added.
Chapter 1Lessons on Life7 lessons · 24 minFree demo inside
- The chapter at a glanceInteractive lesson · 0:54 minFree demo
- 1.1 Concept of BiologyInteractive lesson · 2:21 min
- 1.2 Branches of BiologyInteractive lesson · 4:08 min
- 1.3 Classification of OrganismsInteractive lesson · 6:17 min
- 1.4 Levels of ClassificationInteractive lesson · 2:58 min
- 1.5 Binomial NomenclatureInteractive lesson · 4:40 min
- Chapter 1: Practice Questions and SolutionsInteractive lesson · 2:24 min
Chapter 2Cell and Tissue7 lessons · 53 minFree demo inside
- The chapter at a glanceInteractive lesson · 0:52 minFree demo
- 2.1 The CellInteractive lesson · 3:17 min
- 2.2 Main Organelles of Plant and Animal Cells and Their WorkInteractive lesson · 13:58 min
- 2.3 The Role of Different Cells in the Work of Plants and AnimalsInteractive lesson · 18:57 min
- 2.4 Organs and SystemsInteractive lesson · 4:49 min
- 2.5 The MicroscopeInteractive lesson · 8:46 min
- Chapter 2: Practice Questions and SolutionsInteractive lesson · 2:39 min
Chapter 3Cell Division5 lessons · 19 minFree demo inside
Chapter 4Bioenergetics5 lessons · 35 minFree demo inside
Chapter 5Food, Nutrition and Digestion11 lessons · 73 minFree demo inside
- The chapter at a glanceInteractive lesson · 0:46 minFree demo
- 5.1 Plant Mineral NutritionInteractive lesson · 8:24 min
- 5.2 Food and Nutrition of AnimalsInteractive lesson · 14:00 min
- 5.3 Nutritional Deficiency DiseasesInteractive lesson · 5:59 min
- 5.4 Energy in NutrientsInteractive lesson · 5:06 min
- 5.5 BMR and BMIInteractive lesson · 5:49 min
- 5.6 Exercise and RestInteractive lesson · 1:54 min
- 5.7 Chemicals in Food PreservationInteractive lesson · 4:45 min
- 5.8 DigestionInteractive lesson · 14:24 min
- 5.9 Intestinal ProblemsInteractive lesson · 8:37 min
- Chapter 5: Practice Questions and SolutionsInteractive lesson · 3:01 min
Chapter 6Transport in Organisms7 lessons · 43 minFree demo inside
- The chapter at a glanceInteractive lesson · 0:47 minFree demo
- 6.1 Plants and WaterInteractive lesson · 4:25 min
- 6.2 Absorption of Water and Mineral SaltsInteractive lesson · 8:21 min
- 6.3 Blood Circulation in the Human BodyInteractive lesson · 11:30 min
- 6.4 Structure and Work of the HeartInteractive lesson · 12:10 min
- 6.5 Some Diseases of the Circulatory SystemInteractive lesson · 3:29 min
- Chapter 6: Practice Questions and SolutionsInteractive lesson · 2:38 min
Chapter 7Gaseous Exchange5 lessons · 27 minFree demo inside
- The chapter at a glanceInteractive lesson · 0:41 minFree demo
- 7.1 Gaseous Exchange in PlantsInteractive lesson · 2:36 min
- 7.2 The Human Respiratory SystemInteractive lesson · 11:06 min
- 7.3 Diseases of the Respiratory TractInteractive lesson · 9:29 min
- Chapter 7: Practice Questions and SolutionsInteractive lesson · 2:56 min
Chapter 8Excretion5 lessons · 22 minFree demo inside
Chapter 9Support and Movement5 lessons · 27 minFree demo inside
Chapter 10Co-ordination9 lessons · 53 minFree demo inside
- The chapter at a glanceInteractive lesson · 1:34 minFree demo
- 10.1 Co-ordination in PlantsInteractive lesson · 10:09 min
- 10.2 Co-ordination in AnimalsInteractive lesson · 4:35 min
- 10.3 The Nervous SystemInteractive lesson · 12:44 min
- 10.4 HormonesInteractive lesson · 4:08 min
- 10.5 Hormone DisordersInteractive lesson · 7:43 min
- 10.6 Disorders of the Nervous SystemInteractive lesson · 4:08 min
- 10.7 Tobacco and DrugsInteractive lesson · 4:17 min
- Chapter 10: Practice Questions and SolutionsInteractive lesson · 3:31 min
Chapter 11Reproduction6 lessons · 44 minFree demo inside
- The chapter at a glanceInteractive lesson · 1:03 minFree demo
- 11.1 Reproduction: Idea and ImportanceInteractive lesson · 4:44 min
- 11.2 Reproduction in PlantsInteractive lesson · 15:46 min
- 11.3 Reproduction in AnimalsInteractive lesson · 13:06 min
- 11.4 Diseases of ReproductionInteractive lesson · 6:10 min
- Chapter 11: Practice Questions and SolutionsInteractive lesson · 2:43 min
Chapter 12Heredity and Evolution6 lessons · 51 minFree demo inside
- The chapter at a glanceInteractive lesson · 1:02 minFree demo
- 12.1 HeredityInteractive lesson · 17:25 min
- 12.2 Sex Determination in HumansInteractive lesson · 4:02 min
- 12.3 Genetic DisordersInteractive lesson · 7:35 min
- 12.4 The Theory of EvolutionInteractive lesson · 17:42 min
- Chapter 12: Practice Questions and SolutionsInteractive lesson · 3:11 min
Chapter 13Environment of Organisms8 lessons · 43 minFree demo inside
- The chapter at a glanceInteractive lesson · 1:14 minFree demo
- 13.1 EcosystemInteractive lesson · 7:25 min
- 13.2 Ecosystem of a PondInteractive lesson · 3:37 min
- 13.3 Food ChainInteractive lesson · 3:17 min
- 13.4 Food WebInteractive lesson · 7:52 min
- 13.5 BiodiversityInteractive lesson · 11:21 min
- 13.6 Conserving Biodiversity and the EnvironmentInteractive lesson · 5:58 min
- Chapter 13: Practice Questions and SolutionsInteractive lesson · 2:26 min
Chapter 14Biotechnology5 lessons · 28 minFree demo inside
Questions
What you'll want to know first
More questionsAre the lessons videos?
No. The Biology lessons are interactive, built with animation and a Bangla voice-over. They open in the browser on a phone or computer.
Can I try before enrolling?
Yes. Lessons marked “free demo” are open to everyone — no login needed.
Does it follow the syllabus?
Yes. The lessons follow the chapters of the Class 9 Biology textbook, in the book's order.
How do I pay?
Send Money with bKash, Nagad or Rocket and submit the transaction ID (TrxID). Once we verify it, every lesson opens.
How long can I watch the lessons?
The enrol box shows how long access lasts. Within that time, watch as often as you like.