A decomposition of integers Whiteboard exercise Play

A genealogical tree Animation Play

Adding a side to a polygon Animation Play

Checking divisibility by 11 Whiteboard exercise Play

Divisibility by 11 Student activity Play

Divisibility by 11 Whiteboard exercise Play

Divisibility by 7 Whiteboard exercise Play

Divisibility by 7 Student activity Play

Divisibility by 8 Student activity Play

Divisibility by 8 Whiteboard exercise Play

Equal numbers – wrong steps in proof Whiteboard exercise Play

Finding a pattern Whiteboard exercise Play

Geometry properties Whiteboard exercise Play

Geometry properties Student activity Play

Integers represented as the sum of powers of 2 Whiteboard exercise Play

Problem solving Interactive lesson Play

Problem solving Whiteboard presentation Play

Sums of powers of 2 Student activity Play

Sums of powers of 2 Whiteboard exercise Play

Sums of square roots of integers Student activity Play

Sums of square roots of integers Whiteboard exercise Play

The divisibility by 7 test Animation Play

The sum of the angles in a polygon Whiteboard exercise Play

The sum of the angles in a polygon Student activity Play

The sum of the angles in an octagon Whiteboard exercise Play

Wrong steps in reasoning Whiteboard exercise Play

Wrong steps in reasoning Student activity Play