Prime factors (steps 1, 2, 3 and 4) Animation Play

Prime numbers Whiteboard exercise Play

Prime numbers Student activity Play

Prime numbers Student activity Play

Prime numbers Whiteboard exercise Play

Prime numbers Animation Play

Prime numbers Student activity Play

Prime numbers and composite numbers Student activity Play

Prime numbers and composite numbers Whiteboard exercise Play

Prime numbers and prime factorisation Whiteboard exercise Play

Prime numbers and prime factorisation Student activity Play

Prime or composite? Animation Play

Prime or not Animation Play

Prime, composite and the other numbers Whiteboard exercise Play

Rectangles Student activity Play

Relatively prime numbers Whiteboard exercise Play

The assumptions and the claim of the theorem Whiteboard exercise Play

Use of a calculator Whiteboard presentation Play

Use of a calculator Class activity Play