Numbers 21 to 50

Week 3

Learning Outcome

Identifies, reads, and writes the number that comes before, after and in between a given number/numbers between the numbers 20 and 50.

Objective

Students will be able to identify and write numbers after, before, between, and missing numbers from 21 to 50.

Prerequisites

● Number recognition and reading (20 to 50)
● Writing numbers 20 to 50
● Concept of tens (Basic understanding that 10 ones make one ten)
● Ability to count sequentially from 1 to 50

Pre-teach Vocabulary

Basic vocabulary:
● Understanding terms like “more,” “less,” “before,” “after,” and “between” about numbers.
● Children should be familiar with the terms -add, plus, equal to
Basic understanding:
● Trace: Following a line or pattern to form a number
● Sequence: The correct order of numbers

Introduction

The teacher greets the students and begins with a warm-up activity, counting aloud from 20 to 50 together.

Once students are focused, the teacher introduces the topic by saying, “Today, we are going to learn something new and enjoyable – how to find the numbers that come before, after, and between other numbers.”

Using a number line or visual aid, the teacher points to a few numbers and asks interactive questions:

What number comes before 35?
What comes after 40?
Can you tell me about the number between 28 and 30?

LTM: Printable number line – Coming soon

Video: What comes after?- Coming soon

ISL Video: What comes after? – Coming soon

Video: What comes before? – Coming soon

ISL Video: What comes before? – Coming soon

Video: What comes between? – Coming soon

ISL Video: What comes between? – Coming soon

Activity 1: Number Bingo

Objective:
To practice recognising numbers from 21 to 50, focus on identifying what comes before, after, or between given numbers.

Importance of the activity for children:

Helps in developing:

Numerical Skills (Number recognition, Sequencing, Place value)
Cognitive Skills (Memory, Pattern recognition, Problem-solving)
Fine Motor Skills (Holding a pencil and crossing the Bingo card)
Social skills (Playing together in a group)
Emotional skills (sense of achievement on completion builds self-esteem)

Resources required:

Bingo cards with numbers from 20 to 50.
Markers or chips for covering numbers.
Call-out sheet with prompts such as
- What number comes before 25?
- What number comes after 37?
- What number comes between 29 and 31?

Setting for the activity:
Classroom desks where children can work individually on the worksheet.

Type of activity: Individual activity

Preparation of activity:

Prepare Bingo cards with a grid of numbers from 20 to 50 (in random order).
Create a list of questions related to numbers before, after, and between.

Role of the teacher: Demonstrator and facilitator

Procedure:

Distribute Cards: Give each child a Bingo card with a random set of numbers from 20 to 50.
Start Game: The teacher calls out questions such as, “What number comes after 45?” or “What number is between 39 and 41?”
Marking the Cards: Children mark the correct number on their Bingo cards if it’s present.
Winning the Game: The first child to get a full row (horizontally, vertically, or diagonally) yells “Bingo!” and wins the round.

Observations:
The teacher observes the listening skills and the quickness of children in identifying the correct numbers.

Conclusion:
Children learn to identify what comes before, after, or between given numbers (from 21 to 50)

LTM: Number Bingo cards – Coming soon

LTM: Call-out questions for the activity – Coming soon

Activity 2: Number Card Sort

Objective:
To practice organizing numbers from 21 to 50 in sequence, focus on identifying what comes before, after, or between given numbers.

Importance of the activity for children:

Helps in developing:

Numerical Skills (Number recognition, Sequencing, Place value)
Cognitive Skills (Memory, Pattern recognition, logical thinking)
Fine Motor Skills (Picking the card, holding the card)
Gross Motor Skills (Walking towards baskets, dropping the card)
Social Skills (Working in teams)
Emotional skills (sense of achievement on completion builds self-esteem)

Resources required:

Number cards (20 to 50)
Small baskets or containers
Timer

Setting for the activity:
The activity can be done indoors or outdoors depending on the space availability.

Type of activity: Group activity

Preparation of activity:
1. Prepare sets of number cards from 21 to 50 (one set per group).
2. Prepare baskets labelled 21 to 30, “31-40,” and “41-50.”

Role of the teacher: Demonstrator and facilitator

Procedure:

Step 1: Forming the Number with Beads

Divide the class into small groups.
Give each group a set of shuffled number cards and three labelled baskets.
Explain the rules.
- Sort the cards into the correct basket by range
- Once sorted, arrange the cards in each basket in ascending order.
- Work together as a team to complete the task quickly.
Set a time limit and start the activity.
Once time is up or all groups finish, review the sorted cards and ask questions like
- What number comes before/after this one?
- What number is between these two?
- If I remove this card, what number is missing?

Observation:
The teacher observes the children engaged in the activity and observes the listening and comprehension abilities of the children and identifies the children in need of help.

Conclusion:
Children learn the numbers that come before, after, and in between numbers in the sequence from 21 through 50.

Video: Number card sort – Coming soon

ISL Video: Number card sort – Coming soon

Worksheet: Number cards sort 21 to 50 – Coming soon

Home Activity

Objective: To reinforce the concept of ‘number after and number before’ through a fun online activity.

Home Activity: Click on the right number – Word Wall – Coming soon

Cross-Curricular Connection:

Language class:
Use words such as ‘after,’ ‘before,’ and ‘between’ in conversations
Art Class:
Children draw a caterpillar or a train with compartments and later use their artwork in math class to write numbers and circle the number before or the number between.

Assessment:
The teacher can give the practice worksheet to the children, which can be followed by an assessment worksheet.

Worksheet: Practice Worksheet – Numbers 21 to 50 – Coming soon

Worksheet: Practice Worksheet – Numbers 21 to 50 (Enlarged) – Coming soon

Worksheet: Assessment Worksheet – Numbers 21 to 50 – Coming soon

Worksheet: Assessment Worksheet – Numbers 21 to 50 (Enlarged) – Coming soon

Check list for teacher:

Activity	Yes	No	Sometimes
Children can:
Read and tell numbers in a sequence from 21 to 20
Learn the numbers that come before, after, and in between numbers in the sequence from 21 through 50
Form numbers from 21 to 50 using the concepts of tens and ones
Focus on the activity
Complete the activity in the given time
Do the activity independently
Express verbally and through actions, expressions, or gestures

Adaptations for addressing learner variability: Adaptations and strategies – Coming soon

Teacher Resource Document – Coming soon

Source and Attribution of images:
All images used in the above Assets and Aids are originally created.

This digital material has been developed by the Sri Sathya Sai Vidya Vahini Inclusive Education Project, a unit of Sri Sathya Sai Central Trust, Prasanthi Nilayam, as a collaborative offering in the service of our nation.