CBSE Class 10 & 11 · Updated October 2026
Free, chapter-wise notes and printable formula sheets for Indian students — built on the concept-first teaching style Ritik Sir (Babua Sir) is known for at Physics Wallah.
Start here
Both libraries are organised chapter by chapter, in the same order as the NCERT textbook. Each chapter gives you the core idea, the formulas, the mistakes that cost marks and one exam tip you can use the same day.
Real numbers to probability, with the board-exam weightage for every unit. The chapters that decide your score — quadratic equations, arithmetic progressions, triangles and trigonometry — are covered in extra detail.
Sets, trigonometric identities, permutations, binomial theorem, straight lines, conic sections, limits and derivatives. Covers the full 2026-27 syllabus, including the topics CBSE now keeps for internal assessment only.
Most read this month
Euclid’s division lemma, HCF and LCM, irrationality proofs and the terminating-decimal test — the chapter where proof writing begins.
Read the notes →Factorisation, completing the square, the quadratic formula and the discriminant, plus the word-problem patterns that repeat every year.
Read the notes →The six ratios, the standard-value table you can rebuild from two triangles, and the three identities that prove almost every question.
Read the notes →AP, GP, AM and GM, plus the three standard summations that turn long series into one-line answers.
Read the notes →BPT, the three similarity criteria, the area ratio and Pythagoras — with the proof-writing order examiners look for.
Read the notes →Why a limit exists, how to remove an indeterminate form, and the standard derivatives you must know without thinking.
Read the notes →What is inside each chapter
A chapter is not finished when you have read it. These pages are structured around the four things that turn reading into marks.
A short summary tells you what the chapter is really about, so the formulas have somewhere to attach themselves.
Every formula with a note on when to use it — including the ones students mix up under time pressure.
Sign errors, missing ±, diameter used as radius, area ratios left unsquared. Each one is a mark lost by thousands of students every year.
A single, specific habit to use in the paper — not vague advice to “practise more”.
Every chapter’s formulas on one page — ideal for the last week before the exam, when you need recall rather than new learning.
Four weeks, six days a week, with chapter priority, revision slots and a mock-test schedule. Built around the CBSE weightage instead of a wish list.
See the 30-day planSearch trends
These are the phrases that bring students to this site. Each link goes straight to the section that answers it.
About the teacher behind the style
Ritik Mishra is an Indian mathematics educator who teaches CBSE Class 9 and 10 maths at Physics Wallah. Students know him as Ritik Sir or Babua Sir, a nickname that reflects how approachable his classes feel.
He studied chemical engineering at MANIT Bhopal. His own experience of competitive-exam setbacks — CA, CAT and a long UPSC preparation phase — shaped a teaching style built on patience rather than pressure. In class, that shows up as real-world analogies, visual explanations and an insistence on understanding the logic before touching the formula.
This site is an independent project. It is not run by him, but our notes follow the same idea: understand first, memorise second.
Read the full profile| Known as | Ritik Sir, Babua Sir |
|---|---|
| Teaches | CBSE Class 9 & 10 mathematics |
| Platform | Physics Wallah (PW) |
| Education | B.Tech, MANIT Bhopal |
| Popular batches | Udaan, Neev, Warrior, Project 45 |
| Published notes | CBSE Class 10 Mathematics Made Easy |
Details compiled from public sources; see the profile page for references.
Latest updates
All 14 chapters now include formula tables, common mistakes and exam tips aligned to the rationalised 2026-27 syllabus.
Both formula sheets now have a one-click print view that removes menus, ads and sidebars, so you get a clean A4 revision sheet.
The notes library now searches all 28 chapters by topic, chapter number or keyword.
Before you go
Yes. Every chapter, formula sheet and study plan can be read without an account. The site is funded by advertising, which is why you see ads around the content. You can print any page to PDF for offline use.
No. They are independent notes written for this site, based on the NCERT textbook and the CBSE syllabus. Ritik Sir’s official class notes are distributed inside the Physics Wallah app and his YouTube channel. We link to those where possible rather than copying them.
Start with the highest-weightage units: Algebra in Class 10 (20 marks) and Algebra plus Sets and Functions in Class 11 (25 and 23 marks). Then add the chapters you already understand reasonably well — quick wins build momentum before you attack the hardest chapter.
Read all frequently asked questions →
Ritik Sir Notes is an independent, unofficial fan project. It is not affiliated with, endorsed by or sponsored by Ritik Mishra or Physics Wallah. Names and trademarks belong to their respective owners. See our disclaimer.
