Count efficiently in groups of ten

I can count in groups of ten and identify how many groups there are.

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Year 1

Count efficiently in groups of ten

I can count in groups of ten and identify how many groups there are.

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Lesson details

Key learning points

Objects can be put into groups of 10 to make them easier to count.
Groups of 10 can be called tens.
It is more efficient to skip count in tens than to count in ones
Counting back in tens from the total amount can be used to check that the count was accurate.

Common misconception

Children may confuse the number of groups with the amount altogether, for example, they may count 4 groups of 10 as 4 not 40 They may also confuse the number of groups with the group size.

Draw a ring around each group of 10 whilst using the stem sentence to help describe what you are seeing as you identify each group.

Keywords

Groups of 10 - Groups of ten objects that can be counted in tens.
Tens - Another name for the multiples of ten.
Decade numbers - These are the multiples of ten which mark the tens boundary where the pattern of counting changes.
Altogether - The amount in the whole set or group.
Efficiently - Not wasting time or effort. An efficient strategy is one we can carry out easily.

Confidence in counting in tens must be developed through frequent practice across the year as it lays the foundation for multiplying by 10 in Year 2. Provide opportunities to sing songs and recall rhymes that aid this and, wherever possible, count real objects grouped in tens.

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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).