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 Student activity Play

Proofs and assumptions Whiteboard exercise Play

Pythagoras' theorem – geometric proof Student activity Play

Pythagoras' theorem – geometric proof Whiteboard exercise 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

Sum of the angles in a quadrilateral – proof Animation Play

Sum of the angles in a triangle – proof Animation Play

Sums of square roots of integers Student activity Play

Sums of square roots of integers Whiteboard exercise Play

Surds – the proof Animation Play

Surds – the proof (general case) Animation Play