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Year 1 - Maths

Count efficiently in groups of two

Unitising and coin recognition - counting in 2s, 5s and 10s

Unit Summary

In this unit pupils will count efficiently in groups of 2 5 10. They will recognise and explain the value of 1p 2p 5p 10p coins and how a single coin can be worth several pennies. 

Lesson Summary

You will learn to count in groups of two and identify how many groups there are.

Key Notes

  • Objects can be put into groups of 2 to make them easier to count.
  • It is more efficient to skip count in twos instead of ones.
  • Groups of 2 can be called twos.
  • Counting back in twos from the amount altogether can be used to check that the count was accurate.

Vocabulary To Learn

  • Groups of 2: Groups of two objects that can be counted in twos.
  • Twos: Another name for the multiples of two or even numbers.
  • Altogether: The amount in the whole set or group.
  • Accurately: An accurate result means a result that is correct.
  • Efficiently: Not wasting time or effort. An efficient strategy is one we can carry out easily.

Common Mistakes To Avoid

  • Children may confuse the number of groups with the amount altogether, for example, they may count 3 groups of 2 as 3 not 6 They may also confuse the number of groups with the group size.

3 Quick Questions (With Answers)

1. Solve this in steps: explain the method from this lesson and why each step matters.

Objects can be put into groups of 2 to make them easier to count. It is more efficient to skip count in twos instead of ones.

2. Use this key word in a maths sentence and explain it clearly. 'Groups of 2'

Groups of two objects that can be counted in twos. Use this word when showing your method, then check your final answer is reasonable.

3. Spot and fix this common maths mistake.

Mistake: Children may confuse the number of groups with the amount altogether, for example, they may count 3 groups of 2 as 3 not 6 They may also confuse the number of groups with the group size. Correction: Draw a ring around each group of 2 whilst using the stem sentence to help describe what you are seeing as you identify each group.

More Lessons In This Unit

Browse all guides in the Year 1 Maths guide library.