The next number in the count is one more than the number before and there will be one more object in the set.

The previous number in the count is one less than the next number and there will be one fewer object in the set.

Finding one more and one less using representations

Maths

In this unit pupils will consolidate counting to 20 and back They will secure their understanding of the teens numbers in a cardinal and an ordinal context In the future unit pupils will extend their counting to counting the decade numbers and making representations using a variety of different manipulatives

In prior learning, pupils will have learnt to count confidently and have developed a deep understanding of the numbers to 10, the relationships between them and the patterns within those numbers. In this unit pupils will consolidate counting to 20 and back and will secure their understanding of the teens numbers in a cardinal and an ordinal context.

Counting to and from 20

What number comes before 13 when you are counting to 20?

What number comes after 16 when you count from 20 back to zero?

What do you notice about these sticks of cubes?

How many beads are there on the first bead string?

Which of the following comparative sentences is true for these blocks?

Which comparative sentence is true for this number track?

This lesson will be removed by end of Summer Term 2025.

Finding one more and one less using representations

Lesson outcome

This lesson will be removed by end of Summer Term 2025.