Success: recognise common multiples by generating and checking lists. Prepare multiples cards from materials. (AC9M5N02)
- Warm · 2 min. Count by fours to 20; ask what a multiple means.
- Model · 4 min. List positive multiples of 4 and 6 to 36. Circle
12, 24, 36as common values. - Guided why · 5 min. Show that
12=3×4=2×6. Ask if18appears on both lists; it does not appear on the 4 list. - Independent turn · 7 min. Find common multiples of 3 and 5 up to 30; key
15, 30. Then invent a packing or calendar situation where a common multiple matters, without claiming an actual timetable. - Check method · 4 min. Partners swap lists, circle an error, and verify it with multiplication rather than agreement.
- Exit · 3 min. “Is 24 a multiple of 6? Give the fact.” Key: yes,
6×4=24.