Counterexamples and proofs Whiteboard exercise Play

Deductive reasoning Class activity Play

Deductive reasoning Whiteboard presentation Play

Demonstration of a theorem Animation Play

Demonstration or proof? Student activity Play

Demonstration or proof? Animation Play

Different angles Student activity Play

Different ways of proving – example as a proof Whiteboard exercise Play

Distance formula in 3-dimensional space Student activity Play

Equal numbers – wrong steps in proof Whiteboard exercise Play

Equation of a circle Animation Play

Example as a proof Student activity Play

Example as a proof Whiteboard exercise Play

Expansion of rational functions Whiteboard presentation Play

Expansion of rational functions Class activity Play

Factorisation and roots of polynomials Class activity Play

Factorisation and roots of polynomials Whiteboard presentation Play

Factorisation of a quadratic function – Vieta's theorem Whiteboard exercise Play

Factorisation using the Factor Theorem Whiteboard exercise Play

Factorisation using Vièta's theorem Student activity Play

Factorising using the Integer Root Theorem Whiteboard exercise Play

Facts and assumptions Student activity Play

Facts and assumptions – the sum of the numbers Whiteboard exercise Play

Find the angle Whiteboard exercise Play

Finding roots using the Factor Theorem Whiteboard exercise Play