Teaching addition and subtraction for mastery

Thank you to Caroline Clissold for these practical ways to help children acquire mastery in these two operations.

Following on from this month’s article on mastery in practice, here are some ideas for how you could help children acquire mastery in addition and subtraction. These ideas are specifically targeted at Year 2 but can be adapted for any year group.

First of all consider:

• What is the ‘big picture’ in this concept?
• What will be your starting point?
• How will you explore addition and subtraction in tandem?
• How can you draw out the idea of total, difference, inverse?
• What vocabulary will you introduce?
• What activities could you give the children to develop and deepen their understanding?
• What activities will offer variance (intelligent practice)?
• How will you teach the concept of exchange?
• How can this be accessed by all?

Here are some examples of practice activities that you could give to the children:

Basic practice

153 - 43

What do you notice?

Practice within a context

Cut 4 strips of paper to these lengths:

29cm

Find the totals of different pairs.

Find the differences between different pairs.

Digging deeper

Use addition to fill in the missing numbers

Can you give me a pair of numbers with a difference of 12? And another.....and another.....and another?