Academic Session 2026-27

Tamil Nadu Board Class 9 Chapter Weightage 2026-27

Complete Mark Distribution for TNBSE Class 9 All Subjects

5 Subjects • Chapter-wise Marks • 80 Theory + 20 Internal • Plan Your Preparation

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Chapter-wise Weightage 2026-27

Tamil (தமிழ்) - Chapter Weightage

Unit	Topics Covered	Marks	Weightage
இலக்கியம் (Literature)	கற்பனை இலக்கியம் - கவிதை மற்றும் உரைநடை உரைநடை இலக்கியம் - சிறுகதை, கட்டுரை இலக்கிய வரலாறு - பண்டைய, இடைக்கால, நவீன இலக்கியப் படைப்பாளர்கள்	25	31.25%
இலக்கணம் (Grammar)	சந்தி - உயிர்ச்சந்தி, மெய்ச்சந்தி சமாசம் - தத்புருச, பஹுவிரிஹி வேற்றுமை - முதலாம், இரண்டாம், மூன்றாம் அணிகள் - உவமை, உருவகம், தொடை சொல்வகை - பெயர்ச்சொல், வினைச்சொல்	30	37.5%
உரைநடை (Composition)	கட்டுரை எழுதுதல் - விளக்கவுரை கடிதம் எழுதுதல் - முறையான சுருக்கம் எழுதுதல் கதை எழுதுதல்	20	25%
உள்கருத்து (Workbook)	பயிற்சி கேள்விகள் செயல்பாடுகள் மற்றும் திட்டங்கள் வீட்டுப்பாடம் மற்றும் தொடர் மதிப்பீடு	5	6.25%
Total		80	100%

Internal Assessment: 20 marks (Periodic Tests - 10, Notebook - 5, Subject Enrichment - 5)

English - Chapter Weightage

Unit	Topics Covered	Marks	Weightage
Reading Comprehension	Unseen passages with comprehension questions Inference and analytical questions Summary writing from passages	15	18.75%
Prose	Selected prose pieces from prescribed textbook Character analysis and plot study Thematic and stylistic analysis	20	25%
Poetry	Selected poems from prescribed textbook Poetic devices and analysis Rhyme scheme and meter study	15	18.75%
Grammar	Tenses - Present, Past, Future Active and Passive Voice Direct and Indirect Speech Error Correction	20	25%
Writing Skills	Essay Writing - Descriptive, Narrative Letter Writing - Formal, Informal Story Writing with given clues	10	12.5%
Total		80	100%

Internal Assessment: 20 marks (Periodic Tests - 10, Notebook - 5, Subject Enrichment - 5)

Mathematics - Chapter Weightage

Unit	Topics Covered	Marks	Weightage
Number Systems	Rational Numbers - Properties and Operations Exponents and Powers - Laws Squares and Square Roots	12	15%
Algebra	Linear Equations in One Variable Algebraic Expressions and Identities Factorization of Algebraic Expressions Polynomials and Operations	18	22.5%
Geometry	Understanding Quadrilaterals - Properties Practical Geometry - Constructions Triangles and their Properties Circle and its Parts	18	22.5%
Mensuration	Area of Plane Figures Surface Area and Volume of Cubes, Cuboids Heron's Formula	15	18.75%
Data Handling	Data Handling and Representation Probability - Basic Concepts Mean, Median, Mode	10	12.5%
Total		80	100%

Internal Assessment: 20 marks (Periodic Tests - 10, Notebook - 5, Subject Enrichment - 5)

Science - Chapter Weightage

Unit	Topics Covered	Marks	Weightage
Biology	Cell Structure and Functions Microorganisms: Friend and Foe Crop Production and Management Reproduction in Animals	22	27.5%
Chemistry	Materials: Metals and Non-Metals Chemical Reactions and Equations Acids, Bases and Salts Physical and Chemical Changes	20	25%
Physics	Force and Pressure - Types and Effects Sound - Production and Propagation Light - Reflection and Refraction Electricity - Basic Circuits	20	25%
Environmental Science	Air and Water Pollution Environmental Conservation Natural Resources and their Conservation	18	22.5%
Total		80	100%

Internal Assessment: 20 marks (Periodic Tests - 10, Notebook - 5, Subject Enrichment - 5)

Social Science - Chapter Weightage

Unit	Topics Covered	Marks	Weightage
History	Ancient Indian History - Indus Valley, Vedic Age Modern Indian History - British Rule, Freedom Struggle Indian National Movement - Key Events	25	31.25%
Geography	Physical Geography - Landforms, Climate, Rivers Indian Geography - States, Capitals Map Work - India, Tamil Nadu	25	31.25%
Economics	Basic Economics Concepts Indian Economy - Sectors Money and Banking - Functions	15	18.75%
Civics	Indian Constitution - Preamble, Fundamental Rights Indian Democracy - Legislature, Executive Local Government - Panchayati Raj	15	18.75%
Total		80	100%

Internal Assessment: 20 marks (Periodic Tests - 10, Notebook - 5, Subject Enrichment - 5)

Smart Preparation Tips Based on Weightage

Focus on High-Weightage Topics

Prioritize units with higher marks like Grammar in Tamil and Algebra in Mathematics.

Balance Subjects Effectively

Allocate study time proportionally to the weightage of each subject.

Internal Assessment Matters

Don't ignore the 20 internal marks. Submit notebooks on time and participate in enrichment activities.

Practice Previous Papers

Solve previous year papers to understand the pattern and mark distribution better.

Frequently Asked Questions About Chapter Weightage

How is the chapter weightage useful for exam preparation?

Chapter weightage helps students prioritize their study time effectively. By knowing which chapters carry more marks, you can allocate more time to high-weightage topics while still covering all units.

Does the chapter weightage change every year?

The chapter weightage is generally consistent year to year, but check the official TNBSE website for any updates.

What is the passing criteria for Class 9?

Students must secure a minimum of 35% marks in each subject to pass. This applies to both theory and internal assessment components combined.