CBSE Class 10 Notes 2026-27
CBSE Class 10 Notes are concise, chapter-wise summaries of the NCERT syllabus that help students revise efficiently before the 2027 Board Examinations. Good revision notes capture the most important definitions, concepts, formulas, diagrams, and key points from each chapter — making the final weeks of preparation faster and more focused.
Whether you prefer detailed notes or short bullet-point summaries, having well-organised notes for all subjects is essential for scoring 90+ in the CBSE Class 10 board exam.
Why Notes Are Essential for CBSE Class 10 Board Preparation
|
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 |
Subject-Wise Chapter Coverage for CBSE Class 10 Notes
Mathematics Notes
|
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 |
Science Notes
|
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 |
Social Science Notes
History
|
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 |
Geography
|
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 |
Political Science
|
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 |
Economics
|
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 |
English Notes
|
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 |
How to Make Effective Revision Notes
|
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 |
Recommended Notes Schedule for CBSE Class 10 (2026-27)
|
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 Sheet: Key Mathematics Formulas at a Glance
|
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 |
For ready-made, well-structured revision notes aligned with the CBSE Class 10 syllabus 2026-27, Oswaal Books' Revision Notes are designed to help students revise the entire syllabus quickly before exams — with chapter summaries, mind maps, and formula lists curated to save time and improve retention.
Frequently Asked Questions
NCERT textbooks form the foundation. Concise notes made from NCERT — supplemented by NCERT Exemplar for practice — are sufficient for most subjects.
Yes. Each subject benefits from notes differently — formula sheets for Maths, diagram notes for Science, timeline-based notes for History, and structure notes for English writing.
Ideal chapter notes are 2–4 pages — detailed enough to cover all key points but concise enough to revise in under 30 minutes.
Revise notes immediately after completing a chapter, then once a week during the preparation phase, and daily in the final two weeks before the board exam.
