Students in Class 9–12 who have practised the chapter but still don’t know what they would score. Parents who want a clear mark sheet, not a vague “looks correct”.

Which classes, subjects and papers are covered?

CBSE Class 9–12. NCERT Maths, Science, and Class 11–12 Physics, Chemistry and Biology question banks are live. Board papers, PYQs and sample papers for Class 10–12 sit in the same practice flow — pick a question, snap your work, get full step marking.

How is this different from ChatGPT or other AI?

ChatGPT guesses from whatever marking scheme you upload. Snap & Grade already has a CBSE-style key on every question — formula, working, units, final answer. You don’t hunt a PDF. You pick the question and see marks the way CBSE splits them.

Why do students lose marks even after practising?

About 3 in 10 students lose marks because they don’t know how to write the answer — missing a step, units, or the statement the examiner wants. Snap & Grade shows which step was cut and how to write it in the exam.

New accounts get 100 free credits once. A full step-marked check uses about 5 credits. After that, recharge from ₹1 (₹1 = 1 credit) via Razorpay. Credits stay on your account.

Do you store my solution photo?

No. History saves the question, your marks, the text we graded, and tips — not the photo. Sign-in is only so your wallet and history stay on your account.

Can I download NCERT chapter PDFs?

Yes. On the same page you can open Class 9–12 Maths, Class 9–10 Science, and Class 11–12 Physics, Chemistry and Biology chapter PDFs in the on-site reader — study, practise, then grade.

Go to mentr.in/snapandgrade/grade, log in as a parent or student, pick class → subject → chapter → question, snap a clear photo, confirm the text, and see step marks.

Is Snap & Grade free?

Yes to start. You get 100 free credits once. That is about 20 full grades. After that you pay from ₹1. ₹1 = 1 credit. A full grade uses about 5 credits.

Do I need a tutor for this?

No. Snap & Grade is for self-practice. You write the answer at home, snap it, and see marks. You can still hire a tutor on Mentr if you want extra help.

Does it work on a phone?

Yes. Open mentr.in/snapandgrade on your phone browser. Take a photo of the notebook page with the camera. No app to install.

What if my photo is blurry?

Take it again in good light, on a flat page, with all working in the frame. You can also edit the digital text before we grade — credits go only after you confirm.

Is this the official CBSE mark sheet?

No. It is practice marking in the CBSE style — step by step, like a board key. It helps you write better. It is not your board result.

CBSE step marking100 free credits

Snap & Grade by Mentr

Practised the chapter.
Still unsure about marks?

Grade the answers you already wrote — as per CBSE. Class 9–12 Maths, Science, Physics, Chemistry and Biology NCERT, plus board papers, PYQs and sample papers. See the step that lost the mark, and how to write it in the exam.

mentr.in / snapandgrade / grade

CBSE key loadedEx 2.3 · Q4

Student photographing a handwritten CBSE NCERT solution to grade

As the board marks it

3/5

Formula 1/1
Working 1/1
Units & last line 0/1

Tip: write the unit next to the final value. That’s the missing mark.

3500+

Questions

NCERT + board practice

9–12

Classes

CBSE desk

100

Free credits

On new accounts

₹1

Min top-up

₹1 = 1 credit

Class 9 MathsClass 10 ScienceClass 11 MathsClass 12 MathsClass 11 PhysicsClass 12 PhysicsClass 11 ChemistryClass 12 ChemistryClass 11 BiologyClass 12 BiologyNCERT exercisesBoard papersPYQSample papersCBSE step markingWriting tipsClass 9 MathsClass 10 ScienceClass 11 MathsClass 12 MathsClass 11 PhysicsClass 12 PhysicsClass 11 ChemistryClass 12 ChemistryClass 11 BiologyClass 12 BiologyNCERT exercisesBoard papersPYQSample papersCBSE step markingWriting tips

What Snap & Grade is

A CBSE-style mark sheet for the page you already wrote.

Snap & Grade by Mentr is a paid practice tool (100 free credits to start). It is not a tutor. It is not ChatGPT with a PDF. You pick a Class 9–12 question, photograph your notebook, and see marks the way a board key splits them — plus a short tip on how to write it next time.

What it is

Photo in. Step marks out.

Every question already has a CBSE-style key — formula, working, units, last line. You do not hunt a marking-scheme PDF. You grade the answer you practised at home.

How to use it

Three steps on your phone.

1. Pick class, subject, chapter, then the exact question.
2. Snap a clear photo of your working. Confirm the text.
3. See which step kept the mark — and how to write it in the exam.

How it helps

Know the score tonight.

Stop guessing marks before boards
See the step that lost easy marks
Learn the sentence the examiner wants
3500+ questions · 100 free credits

New to this? Start with 100 free credits.

The quiet mark leak

3 in 10

students lose marks because they don’t know how to write the answer — not because they don’t know the idea.

You solved it at home. In the paper, a step, a unit, or the last line is missing — and the examiner cuts it. Snap & Grade grades your practice the CBSE way, then shows the sentence that would have kept the mark. Don’t worry about marks first. Learn how to write them.

Study · practise · grade

From your notebook to a mark sheet.

Solve on paper like the exam. Snap it. We mark the steps — and tell you how to write the next one.

01
Pick the question
Class 9–12 → subject → chapter → the exact NCERT, PYQ or sample-paper item. The CBSE-style key is already on it.
02
Snap the answer you wrote
Photograph the page in your notebook. No retyping the sum. One clear photo is enough.
03
See marks — and how to write it
Formula, working, units, final line — scored like the board. Plus a short tip so the next attempt keeps those marks.

Have a chapter done? Grade it in under a minute.

Pick a bank · grade tonight

Maths, Science, Physics, Chemistry, Biology — same CBSE flow.

Open the question you practised. Snap the page. See which step kept the mark.

What comes back

Marks the way the board awards them.

Not a green tick. A split of the question — and a tip written for your attempt, so the next paper doesn’t leak the same mark.

Step scores against a CBSE-style key
Personalized tip on the line you missed
Full history: question, marks, your text — no photos stored
Usually under 8 seconds

mentr.in / snapandgrade / result

Snap & Grade result with CBSE step marks and a writing tip

One place for exam practice

NCERT, PYQ, sample papers. Full marking.

Class 9–12. Study the chapter PDF, practise the question, grade the page you wrote. Board papers and sample papers sit next to NCERT — same CBSE step keys.

→NCERT first — Maths and Science live for Class 9–12.
→Class 10–12 papers and sample questions in the same grader.
→We show the step the examiner wants on the page — so confidence isn’t a guess.

mentr.in / snapandgrade / bank

CBSE-style marking key next to an NCERT chapter list

ChatGPT vs Mentr

Don’t upload a marking scheme. We already have it.

Other AI needs you to find a key, photograph it, and hope. Snap & Grade marks against the CBSE split already on the question.

mentr.in / snapandgrade / vs-chatgpt

Compare

ChatGPT & other AI

Snap & Grade

Marking scheme

You find a PDF and upload it. The AI guesses the steps.

Every question already has a CBSE-style key.

What you get back

A paragraph that “looks right”.

Marks by step — formula, working, units, final answer.

Writing for the exam

Rarely tells you the line the examiner wants.

A short tip on how to write it so those marks stick.

Question bank

Whatever you type that day.

3500+ NCERT + PYQ + sample papers in one place.

History

Lost in a chat.

Question, marks, your text, tips — saved on your account.

Confidence, not guesswork

You won’t lose marks just because of steps.

Everything in one place: the question, the key, your attempt, the mark, the tip. Practise until the writing is as sure as the method.

Know the score tonight·Learn the exam sentence·Tips on your attempt·History you can reopen

What students and parents say

“I knew the method. I still lost the mark.”

Simple English from Class 9–12 desks across India — the same worry Snap & Grade is built for.

“I used to lose 2 marks on units even when the sum was right. Now I see the cut before the test.”
Ananya Sharma
Class 10 · Maths · Jaipur
“My son practises every night. I finally see which step he skipped — not just a tick or a cross.”
Meera Patel
Parent · Class 9 · Ahmedabad
“ChatGPT said my derivation was fine. Snap & Grade showed the missing statement. That is the board mark.”
Rohan Iyer
Class 12 · Physics · Chennai
“Sample paper + photo of my working. Same place. I stopped guessing my score before pre-boards.”
Fatima Khan
Class 10 · Science · Hyderabad
“I practise sets at night and grade in the morning. The missing reason line is always the one I skip when I am tired.”
Arjun Reddy
Class 11 · Maths · Hyderabad
“We do not wait for the tutor to mark homework. She snaps the page, we see the steps, then we ask better questions in class.”
Kavya Nair
Parent · Class 12 · Kochi

Simple credits

Start free. Top up from ₹1.

100 free credits once. Then ₹1 = 1 credit — even a single rupee. A full grade uses about 5 credits.

Start free

₹0

100 credits · once per account

Enough to see how CBSE splits marks on your own notebook. ~20 full grades.

→ NCERT + board-style questions
→ Step marks + writing tips
→ History saved on your account

Most used · Practice

₹100

100 credits · ₹1 each · ~20 full grades

The pack most students top up when free credits run out. Same CBSE step keys. Personalized tips on each grade.

Board season · ₹200 — 200 credits for the weeks before boards. PYQ, sample paper, NCERT, same place.

Razorpay · any amount from ₹1

FAQ

Straight answers before you start.

Snap & Grade is Mentr’s CBSE practice tool. You pick a Class 9–12 NCERT question, photograph the answer you already wrote, and get step marks the way a board examiner awards them — plus short tips on how to write it next time.

Class and subject pages

Same tool. Your paper.

Short pages for Class 9–12 Maths, Science, Physics, Chemistry, Biology, CBSE marking, and NCERT photo grading — then open the grader.

Guides

Read first. Then grade a page.

Free NCERT PDFs

Download Class 9 Mathematics — chapter-wise

Chapter PDFs match the CBSE Class 9 Maths book still used in schools (Number Systems → Statistics).View opens a reader on this page — no redirect. Snap & Grade questions match these PDFs.

Chapter 1 · ready
Number Systems
Naturals, wholes, integers, rationals, irrationals, and real numbers.
Chapter 2 · ready
Polynomials
Degrees, zeroes, factor and remainder theorems, algebraic identities.
Chapter 3 · ready
Coordinate Geometry
Cartesian plane, plotting points, and reading coordinates.
Chapter 4 · ready
Linear Equations in Two Variables
ax + by + c = 0, solutions, and graphing lines.
Chapter 5 · ready
Introduction to Euclid’s Geometry
Euclid’s definitions, axioms, postulates, and equivalent versions.
Chapter 6 · ready
Lines and Angles
Intersecting lines, parallel lines, and angle relationships.
Chapter 7 · ready
Triangles
Congruence criteria, inequalities, and basic triangle properties.
Chapter 8 · ready
Quadrilaterals
Parallelograms, mid-point theorem, and special quadrilaterals.
Chapter 9 · ready
Circles
Chords, angles in a circle, and cyclic quadrilaterals.
Chapter 10 · ready
Heron’s Formula
Area of a triangle using three sides (Heron’s formula).
Chapter 11 · ready
Surface Areas and Volumes
Cubes, cuboids, cylinders, cones, and spheres.
Chapter 12 · ready
Statistics
Collection of data, presentation, and measures of central tendency.

Matched to NCERT PDFs

Maths Classes 9–12, Science Classes 9–10, and Physics, Chemistry & Biology Classes 11–12 are graded from the same NCERT PDFs you can open here. Exercise numbers follow the book print.

100 free credits · from ₹1

Don’t guess your score.
Grade the page you wrote.

CBSE-style step marks on NCERT Maths, Science, Physics, Chemistry and Biology — plus a short tip so the next attempt keeps those marks.

100 free credits once
CBSE-style step marks
Writing tip on every grade
PDFs on the same page

Practised the chapter.Still unsure about marks?