New
New
Year 1
Ordering numbers 11- 20 practically
You can compare and order numbers 11-20 practically.
New
New
Year 1
Ordering numbers 11- 20 practically
You can compare and order numbers 11-20 practically.
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Lesson details
Key learning points
- Understand numbers to 20 in the ordinal context, as part of a number track or line.
- Use the language of first second and third to order numbers and sets of objects to 20.
Keywords
First - The smallest of the values.
Second - The middle value of a set of three.
Third - The largest of the values.
Common misconception
You can't compare and order numbers that are not next to each other in the counting sequence.
Start with numbers close together in the counting sequence and move on to numbers with a larger gap.
Start by comparing numbers of object in a set and move on to the language that allows us to say that 15 is greater than 12 even if we are not labelling a set. We are saying that 15 ones is greater than 12 ones.
Teacher tip
Licence
This content is © Oak National Academy Limited (2024), licensed on Open Government Licence version 3.0 except where otherwise stated. See Oak's terms & conditions (Collection 2).
Lesson video
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Starter quiz
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6 Questions
Q1.
How many robots are there in this picture?
Q2.
If we count on 4 places, what number do we finish on?
12
11
14
Q3.
Match the numbers with their spellings.
ten
eleven
twelve
thirteen
fourteen
Q4.
Which number is missing from the middle bead string?
Q5.
From left to right, (A to B) are we counting backwards, or counting forward?
forward
Q6.
Which of these is a correct comparative sentence for the numbers 7 and 8?
7 is one greater than 8
8 is one fewer than 7
7 is one more than 8
Exit quiz
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6 Questions
Q1.
Put these in the right order to count backwards from 20.
Q2.
Match the sentences so that they are all true.
19
20
15
8
5
Q3.
Order these numbers counting up to 20.
Q4.
Order these numbers counting up to twenty.
Q5.
Which number is missing on the second bead string?
17
16
19
Q6.
Is the number of robots more, equal to, or less than 15?
Less than 15
Equal to 15
Additional material
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