### Planning and Activities

**Day 1**

Use place value cards as a supporting model to revise doubling and halving 2-digit numbers by partitioning and recombining.

**Group Activities: T with Y3**

Y3/4 Whole class -- Play a ‘chain’ game, halve numbers if even; add 1 when numbers are odd.

Y3 -- Play a 4-in-a-row grid game, doubling 2-digit numbers.

Y4 *Use the in-depth problem-solving investigation ‘Set Square’ as today’s group activity.*

Or, use this activity:

-- Play a 4-in-a-row grid game, halving 2-digit numbers.

**Day 2**

Model the grid method for multiplying 2-digit by 1-digit numbers: 14 × 2, 14 × 3, 14 × 6.

**Further Teaching with Y4**

Model the ladder method and compare to the grid method for 3-digit by 1-digit multiplication, e.g. 786 × 4.

**Group Activities: T with Y3**

Y3 *Use the in-depth problem-solving investigation ‘18 Times Table – Wow!’ as today’s group activity.*

Or, use these activities:

-- Describe stepping stones in developing use of the grid method. Rehearse use of preferred image(s) to begin using the grid method.

-- Practise multiplying smaller 2-digit numbers by 1-digit numbers.

Y4 -- Solve 3-digit by 1-digit multiplication challenges.

**Day 3**

Further shared learning of the grid method to build the 24 times table from 1 × 24 to 10 × 24. Link repeated addition to multiplication.

**Further Teaching with Y4**

Estimate and solve multiplications: 4 × 782 618 × 6 5 × 579.

**Group Activities: T with Y4**

Y3 -- Investigate multiplying odd and even 2-digit numbers by 1-digit numbers using the grid method.

Y4 -- Use a written method for 3-digit by 1-digit multiplications, finding answers in a number of given ranges.