Class 1 Mathematics
- Count, read and write numbers to 99
- Add and subtract up to 20
- Explore shapes, measurement, patterns, time, money and data
- Understand equal groups
Preview — Academic Review in Progress
These courses are written to follow the NCERT textbook chapter order and are mapped to the CBSE 2026–27 syllabus. Teacher verification is pending. They are not CBSE-certified or teacher-approved yet.
Bigger or smaller?
Look at a football and a marble. The football takes more space. So the football is bigger and the marble is smaller.
From Chapter 1. Preview only.
Chapters
1Big, Small, Same and DifferentLesson: Big, Small, Same and Different · 15 sections · chapter quiz
Before we count, we learn to look carefully. Is the elephant bigger than the cat? Which basket has more mangoes? Let us become sharp-eyed observers!
- • I can compare objects as big/small, tall/short and more/fewer.
- • I can sort objects that are the same and spot the one that is different.
- • I can use position words: inside, outside, on, under, near, far.
2Shapes: Round, Flat, Rolling and SlidingLesson: Shapes: Round, Flat, Rolling and Sliding · 15 sections · chapter quiz
Push a ball and it rolls away. Push a box and it slides. Why? Let us explore the shapes of things around us!
- • I can describe objects as long, round or flat.
- • I can tell which objects roll and which slide.
- • I can find ball, box, can and cone shapes around me.
3Numbers 1 to 9Lesson: Numbers 1 to 9 · 15 sections · chapter quiz
How many mangoes are in the basket? Counting helps us find out exactly. Let us count from 1 to 9!
- • I can count objects from 1 to 9.
- • I can read and write the numerals 1 to 9.
- • I can match a number to a group of objects.
4Making 10 and Numbers 10 to 20Lesson: Making 10 and Numbers 10 to 20 · 15 sections · chapter quiz
We have 10 fingers! Ten is a very special number. Once we can make 10, counting to 20 becomes easy.
- • I can make 10 in different ways.
- • I can count, read and write numbers from 10 to 20.
- • I can see a teen number as 10 and some more.
5Adding and Taking Away within 9Lesson: Adding and Taking Away within 9 · 15 sections · chapter quiz
You have 3 marbles and a friend gives you 2 more. How many now? If you give 1 away, how many are left? Let us find out!
- • I can add two small groups by putting them together.
- • I can subtract by taking away.
- • I can use + , − and = in simple number sentences.
6Adding and Subtracting up to 20Lesson: Adding and Subtracting up to 20 · 15 sections · chapter quiz
A farmer picks 8 tomatoes in the morning and 5 in the evening. That is more than 10! Let us learn to add and subtract up to 20.
- • I can add numbers with totals up to 20.
- • I can subtract from numbers up to 20.
- • I can use making-10 to add.
7Measuring: Longer, Heavier, Holds MoreLesson: Measuring: Longer, Heavier, Holds More · 15 sections · chapter quiz
Is your pencil longer than your eraser? Is a school bag heavier than a lunch box? Let us measure!
- • I can compare the length of two objects.
- • I can compare which is heavier or lighter.
- • I can compare which container holds more.
8Numbers 21 to 99: Tens and OnesLesson: Numbers 21 to 99: Tens and Ones · 15 sections · chapter quiz
A shopkeeper packs pencils in boxes of ten. How many pencils are in 4 boxes and 6 loose pencils? Tens and ones help us count big numbers fast!
- • I can count in tens: 10, 20, 30 … 90.
- • I can show a two-digit number as tens and ones.
- • I can read and write numbers from 21 to 99.
9Patterns All AroundLesson: Patterns All Around · 15 sections · chapter quiz
Look at a rangoli, a saree border, or a string of festival lights. Many repeat in a special order. These are patterns!
- • I can find a repeating pattern.
- • I can continue a pattern of shapes, colours or sounds.
- • I can make my own pattern.
10Time: My DayLesson: Time: My Day · 15 sections · chapter quiz
You wake up, brush your teeth, eat breakfast and go to school. Our day has an order. Let us learn about time!
- • I can talk about morning, afternoon, evening and night.
- • I can put daily events in order: before, after, first, next, last.
- • I can compare which activity takes longer.
11Equal Groups: How Many Times?Lesson: Equal Groups: How Many Times? · 15 sections · chapter quiz
Every child at the party gets 2 laddoos. If there are 3 children, how many laddoos do we need? Equal groups help us find out!
- • I can make groups that have the same number.
- • I can find a total by counting equal groups.
- • I can skip-count by 2s, 5s and 10s.
12Money: Coins, Notes and Small PurchasesLesson: Money: Coins, Notes and Small Purchases · 15 sections · chapter quiz
At the shop, a pencil costs ₹5. You have two ₹2 coins and one ₹1 coin. Can you buy it? Let us learn about money!
- • I can recognise Indian coins and notes up to ₹20.
- • I can add coins to find a total up to ₹20.
- • I can tell if I have enough money to buy something.
13Sorting and Counting: My First DataLesson: Sorting and Counting: My First Data · 15 sections · chapter quiz
Which fruit does your class like best — banana, mango or apple? We can collect answers, count them and show them in a picture chart!
- • I can sort objects into groups.
- • I can count and record how many are in each group.
- • I can read a simple picture chart and answer questions.
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This is a preview of our Mathematics library. Enrolment, lessons and quizzes are not open to students yet.