Lesson Notes By Weeks and Term v5 - Grade 1

Lesson Video

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Performance objectives

• Welcome to our first week of Grade 1 Mathematics! This week, we're going to explore the exciting world of numbers from 0 to 20. Understanding numbers is like having a special key that unlocks so many things in our daily lives. From counting sweets at the tuck shop to sharing toys with friends, numbers are everywhere! In South Africa, understanding numbers helps us share fairly, measure ingredients for pap and vleis, and even understand how many children are in our class. This week, we'll learn how to count, order, and show numbers in different ways, making us maths superstars!
• By the end of this week, you will be able to:
• Objective 1: Count objects reliably up to 20, both forwards and backwards, using one-to-one correspondence. (CAPS: Counting objects reliably.)
• Objective 2: Recognize and read number symbols and number names from 0 to 20. (CAPS: Reading and writing number symbols and names.)
• Objective 3: Represent numbers from 0 to 20 using concrete objects, drawings, and number lines. (CAPS: Representing numbers in multiple ways.)

Lesson summary

Welcome to our first week of Grade 1 Mathematics! This week, we're going to explore the exciting world of numbers from 0 to

2

0. Understanding numbers is like having a special key that unlocks so many things in our daily lives. From counting sweets at the tuck shop to sharing toys with friends, numbers are everywhere! In South Africa, understanding numbers helps us share fairly, measure ingredients for pap and vleis, and even understand how many children are in our class. This week, we'll learn how to count, order, and show numbers in different ways, making us maths superstars!

Lesson notes

Let's dive into the wonderful world of numbers 0 to 20!

Counting: Counting means assigning a number to each item in a group, one by one. We say "one", then "two", then "three", and so on. It's like giving each object its own special number.

One-to-one correspondence: This is a fancy way of saying that each thing we count gets just one number. We don't skip anything, and we don't count anything twice.

Example 1: Imagine you have 5 marbles. You count them by touching each one and saying: "One, two, three, four, five." The last number you say, "five," tells you how many marbles you have.

Example 2: Let's count some bananas! If you see 7 bananas, you would count: "One, two, three, four, five, six, seven." You have 7 bananas.

Number Symbols and Names: Each number has a symbol (like 1, 2, 3) and a name (like one, two, three). 0 (Zero): Zero means "nothing" or "none". If you have zero apples, it means you don't have any apples at all. 1 (One): Represents a single item. One pencil, one friend, one sun. 2 (Two): Represents a pair. Two shoes, two eyes. 3 (Three): Represents a group of three. Three wheels on a tricycle. And so on... We continue counting like this all the way to 20!

Number Names: It's important to learn how to read and write the names of the numbers too: one, two, three, four, five, six, seven, eight, nine, ten, eleven, twelve, thirteen, fourteen, fifteen, sixteen, seventeen, eighteen, nineteen, twenty.

Representing Numbers: We can show numbers in different ways: Concrete Objects: Use real things like counters, stones, or even sweets!

Drawings: Draw dots, lines, or pictures to represent a number. If you want to show 3, you can draw three dots (● ● ●) or three stars (★ ★ ★).

Number Lines: A number line is a line with numbers written in order. It helps us see how numbers are related to each other. We can use it to count forward and backward.

Example: A number line from 0 to 10 looks like this: 0---1---2---3---4---5---6---7---8---9---10 Ordering Numbers: Ordering means putting numbers in the right sequence, either from smallest to largest (ascending order) or from largest to smallest (descending order).

Smallest to Largest (Ascending): 0, 1, 2, 3, 4, 5...20 Largest to Smallest (Descending): 20, 19, 18, 17, 16, 15...0

Example: Let's order these numbers from smallest to largest: 7, 3, 12,

1. The correct order is: 1, 3, 7,

1

2. Example: Let's order these numbers from largest to smallest: 15, 5, 9,

2

0. The correct order is: 20, 15, 9,

5. Guided Practice (With Solutions) Let's try some practice questions together!

Question 1: Count the number of apples: 🍎 🍎 🍎 🍎. What number represents the number of apples?

Solution: We count each apple: "One, two, three, four." There are 4 apples. The number that represents the number of apples is

4. Question 2: Draw 6 circles.

Solution: ● ● ● ● ● ●. We have drawn six circles, which represents the number

6. Question 3: Order these numbers from smallest to largest: 2, 9,

5. Solution: To order the numbers, we look for the smallest number first, which is

2. Then we compare 9 and 5; 5 is smaller. Finally, we have

9. So, the ordered list is 2, 5,

9. Question 4: What number comes after 10?

Solution: When we count, we go 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10,

1

1. So the number that comes after 10 is

1

1. Question 5: Represent the number 13 using dots.

Solution: We need to draw 13 dots: ● ● ● ● ● ● ● ● ● ● ● ● ●. Independent Practice (Questions Only) Now it's your turn to try some questions on your own!

Count the number of triangles: △ △ △ △ △ △ △ △ △. What number represents the number of triangles? Write the number name for the number

8. Order these numbers from largest to smallest: 14, 6,

1

8. Draw 9 squares. What number comes before 5? Represent the number 17 using a number line (draw a number line from 0 to 20 and mark 17). Write the number symbol for the number "eleven". Order these numbers from smallest to largest: 11, 1, 15,

4. Count backwards from 10 to

5. Is 0 more than or less than 1?