One equals zero! Animation Play

Plans Simulation Play

Plans Student activity Play

Problem assumptions Class activity Play

Problem assumptions Whiteboard presentation Play

Problem solving Whiteboard presentation Play

Problem solving Class activity Play

Proof Animation Play

Proof Animation Play

Proof Animation Play

Proof Animation Play

Proof and demonstration of a theorem Animation Play

Proof and demonstration of the formula for the area of a triangle Student activity Play

Proofs and assumptions Whiteboard exercise Play

Proofs and assumptions Student activity Play

Pythagoras' theorem – geometric proof Student activity Play

Pythagoras' theorem – geometric proof Whiteboard exercise Play

Pythagorean triples Student activity Play

Rational numbers are dense on the number line Student activity Play

Rational numbers on the number line – proof of existence Animation Play

Remainder theorem – proof Animation Play

Roemer's proof Whiteboard exercise Play

Roemer's proof Student activity Play

Sum of angles in a quadrilateral Animation Play

Sum of angles in quadrilaterals Student activity Play