### Teaching and Group Activities for Understanding

**Day 1 Teaching**Show a number balance with weights: 6 one side and 10 on the other. If you hang a weight on LHS it’ll balance. Balance 6 and 4 with 10. Record 6 + □ = 10. Discuss how 4 goes in the box. Repeat for other bonds to 10. Then for 9, 8 and 7.

**Group Activities**

Use the ‘Addition Towers’ in-depth problem-solving investigation below as today’s group activity.

Or, use these activities:

**-- Children use balance bars to create balanced number sentences up to 10.**

**Day 2 Teaching**Show a bead frame (2 rows of 10 beads) or a bead string (20 beads). Hide a number of beads and ask children to say missing number. Record with a missing number sentence: 15 + [_] = 20. Repeat for other bonds to 20.

**Group Activities**

-- Children find missing numbers to create a pair of numbers that add up to 20.

**Day 3 Teaching**Show picture of a strip of 10 red cubes with a strip of 6 blue and 4 yellow cubes below (see resources) or use real interconnecting cubes. Demonstrate pairs to 10 and 20. Write related addition and subtraction facts.

**Group Activities**

-- Children use bar models to create pairs of numbers that add up to 10 and 20, using inverse operations.