CBSE Class 10 Notes 2026-27

Reason

Benefit

Faster revision

Cover a full chapter in 20–30 minutes instead of hours

Formula & definition recall

Quick access to important points before the exam

Diagram revision

Visual aids for Science and Social Science chapters

Exam-focused content

Prioritise topics based on marks and frequency

Reduce last-minute panic

Well-made notes eliminate the need to open full textbooks in the last week

Chapter

Key Points to Cover in Notes

Real Numbers

Euclid's Division Lemma, Fundamental Theorem of Arithmetic, proof of irrationality

Polynomials

Relationship between zeros and coefficients, graphical meaning

Pair of Linear Equations

All algebraic methods (substitution, elimination, cross-multiplication), conditions for consistency

Quadratic Equations

Factorisation, quadratic formula, discriminant and nature of roots

Arithmetic Progressions

nth term formula, Sum of n terms formula, AP word problems

Triangles

Basic Proportionality Theorem (with proof), similarity criteria (AA, SSS, SAS), Pythagoras Theorem

Circles

Tangent properties, theorems (with proof)

Trigonometry

Standard ratios, complementary angles, identities

Heights and Distances

Angle of elevation/depression — standard problem types

Areas Related to Circles

Sector, segment area formulas

Surface Area & Volume

All formulas — cone, cylinder, sphere, hemisphere, frustum

Statistics

Mean (3 methods), Median, Mode formulas for grouped data

Probability

Classical definition, complementary events, simple cases

Chapter

Key Points to Note

Chemical Reactions & Equations

Types of reactions, balancing equations, and activity indicators

Acids, Bases & Salts

pH scale, indicators, reactions, salts and their properties

Metals & Non-Metals

Reactivity series, extraction of metals, corrosion

Carbon & its Compounds

Covalent bonding, functional groups, IUPAC naming, reactions (combustion, oxidation, substitution, addition)

Life Processes

Nutrition, respiration, transportation, excretion — diagrams (nephron, heart, stomata, villi)

Control & Coordination

Nervous system (reflex arc diagram), plant hormones, endocrine glands

Reproduction

Asexual methods, human male/female reproduction diagrams

Heredity & Evolution

Mendel's laws, monohybrid/dihybrid cross diagrams, Darwin's theory, speciation

Light

Mirror formula, lens formula, power, refraction through prism

Human Eye

Structure and defects of the eye (myopia, hypermetropia, presbyopia)

Electricity

Ohm's Law, resistance, series and parallel circuits, heating effect

Magnetic Effects

Magnetic field, motor principle, generator, domestic circuits

Our Environment

Food chains, trophic levels, biodegradable vs non-biodegradable

Management of Natural Resources

Conservation, pollution, 3Rs — case studies

Chapter

Key Notes Focus

Nationalism in Europe

French Revolution ideas, unification of Germany and Italy, key figures

Nationalist Movements in Indo-China

French colonialism, Vietnamese resistance

Nationalism in India

Non-Cooperation Movement, Civil Disobedience Movement, Gandhi's role, key events timeline

Age of Industrialisation

Proto-industrialisation, factory system, labour conditions

Print Culture

Printing press, its social impact, newspapers in India

Chapter

Key Notes Focus

Resources & Development

Types of resources, soil types, and soil conservation

Forest & Wildlife

Vegetation types, biosphere reserves, Project Tiger

Water Resources

Dams (Bhakra Nangal, etc.), rainwater harvesting — map locations

Agriculture

Types of farming, cropping seasons, Green Revolution

Minerals & Energy Resources

Types of minerals, conventional vs non-conventional energy

Manufacturing Industries

Types, industrial pollution, measures

Lifelines of National Economy

National Highways, airways, waterways — map work

Chapter

Key Notes Focus

Power Sharing

Forms of power sharing: Belgian and Sri Lankan case studies

Federalism

Key features, types, Indian federalism

Democracy & Diversity

Social divisions, case studies

Gender, Religion, Caste

Communalism, secularism, role in politics

Political Parties

Functions, types, national and regional parties

Outcomes of Democracy

Democratic vs authoritarian regime comparison

Chapter

Key Notes Focus

Development

Development goals, HDI components, comparison of countries

Sectors of Indian Economy

Primary/Secondary/Tertiary sectors, organised/unorganised

Money & Credit

Formal vs informal credit, self-help groups, RBI

Globalisation

MNCs, liberalisation, impact on the Indian economy

Consumer Rights

COPRA, consumer courts, consumer awareness

Area

What to Note

Reading

Common passage themes: question patterns (title, summary, vocabulary)

Letter Writing

Formal letter format — editor/complaint/enquiry

Analytical Paragraph

Structure: topic sentence → explanation → example → conclusion

Grammar

Tense changes (reported speech), active/passive, modals, editing patterns

Literature

Character sketches, theme summaries, and poetic devices for First Flight

Supplementary

Story summaries and lesson-wise messages from Footprints Without Feet

Tip

Explanation

Use the NCERT chapter as the base

All board questions come from NCERT — never ignore it

Write in your own words

Rewriting improves retention better than copying

Include diagrams

Draw and label key diagrams (heart, nephron, circuit, ray diagram)

Highlight formulas separately

Keep a dedicated formula sheet for Maths and Science

Colour-code by importance

Use different colours for definitions, examples, and exam tips

Revise notes within 24 hours

The forgetting curve is steepest on the first day — quick revision locks information

Phase

Activity

June – August 2026

Make chapter-wise notes as you study each chapter for the first time

September – October 2026

Revise and condense notes into 1-page chapter summaries

November – December 2026

Use condensed notes alongside sample paper practice

January 2027

Create a final "master sheet" of all formulas, key terms, and diagrams per subject

February 2027

Read master sheets daily; no new notes needed at this stage

Formula

Expression

Quadratic Formula

x = (–b ± √(b²–4ac)) / 2a

nth Term of AP

aₙ = a + (n–1)d

Sum of AP

Sₙ = n/2 [2a + (n–1)d]

Area of Sector

(θ/360) × πr²

Volume of Cone

(1/3)πr²h

Surface Area of Sphere

4πr²

Mean (Direct Method)

x̄ = Σfᵢxᵢ / Σfᵢ

Tangent-Radius Theorem

Tangent ⊥ Radius at point of tangency