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.
-- 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.
-- 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.
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.