### Teaching and Group Activities for Understanding

**Day 1 Teaching**

Find common multiples. Use the ITP Number Grid to highlight multiples of 3 and 2, and then show that common multiples are all multiples of 6. Repeat for other common multiples.**Group Activities**

-- Use a Venn diagram to sort multiples, placing common multiples in the intersection.

-- Find pairs of numbers which have common multiples, using a Venn diagram to help.**Day 2 Teaching**

Write 24. What numbers go into 24 exactly? Take feedback. Remind children that numbers which divide into 24 exactly are factors of 24. Together make an ordered list: 1, 24; 2, 12; 3, 8; 4, 6. Point out systematic approach. Repeat for 27 and 36.**Group Activities**

-- Find the number less than 50 with the greatest number of factors, find numbers which have an even number of factors and numbers which have an odd number of factors.**Day 3 Teaching**

Display word problems one at a time: Agree calculation for each. Solve. Discuss if answer should be rounded up or down. Challenge children to think of a problem where they would round up, and one to round down.**Group Activities**Use the ‘Long As You Like’ in-depth problem-solving investigation below as today’s group activity.

Or, use these activities:

-- Use sketches/cubes to represent division problems to help determine if answers need to be rounded up or down.