☰ Year plan · Mathematics

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Week 13 · Unit 6 · 6.1 · 4 lessons
1

1st, 2nd, 3rd

Learner’s Book 1: Unit 6, pp. 87–90
GoalSay and write ordinal numbers (1st, 2nd, 3rd …) to show the position of people and things in a line.
New words
ordinal number · a number that tells the place in order, like 1st or 2ndposition · where something isfirst · the one at the very start
Explanation

Ordinal numbers tell us the position of a person or a thing. They tell us who is first, who is second and who is third. An ordinal number is not a ‘how many’ number. We can write them like this: 1st, 2nd, 3rd, 4th, 5th. We can also say them with words: first, second, third, fourth, fifth. In a race, the runner at the front is 1st. The runner behind is 2nd. We also use them for the order we do things in: 1st we put on our socks, 2nd we put on our shoes.

Ordinal numbers in numbers and words
1st2nd3rd4th5th
firstsecondthirdfourthfifth
Worked examples
1st2nd3rd4th5th
AliSaraLeoMiaZara
Look at the race. Ali is 1st, Sara is 2nd and Leo is 3rd. Mia came 4th and Zara came 5th.
12345678
Eight boats are in a row. The coloured square shows where the 6th boat is. Count the squares from the start: 1, 2, 3, 4, 5, 6.
Nodira is 4th in a long line. That does not mean there are 4 children. It only tells us her place. There may be 10 children in the line.
1st2nd3rd
walk homeeat lunchdo homework
Three things we do after school: 1st we walk home, 2nd we eat lunch, 3rd we do homework.
Class activity

Line-up game: put 5 toys in a row on the floor. Your partner says, ‘Touch the 3rd toy!’ or ‘Which toy is 1st?’ Take turns. Then change the order and play again.

Practice
1
Who came 2nd in the race?
1st2nd3rd4th
NodiraKenjiRaviAna
2
The coloured square is in which place? Say it with a number and a word.
123?56
3
Sara is 5th in the queue. Does ‘5th’ tell us there are 5 children?
4
Write first, second and third with numbers and letters.