Analysing the assumptions of a theorem Animation Play

Congruent triangles Student activity Play

Congruent triangles Simulation Play

Congruent triangles Animation Play

Facts and assumptions Student activity Play

Facts and assumptions – algebraic expressions Whiteboard exercise Play

Facts and assumptions – algebraic inequalities Whiteboard exercise Play

Facts and assumptions – prime numbers Whiteboard exercise Play

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

Necessity of assumptions Student activity Play

Necessity of assumptions Whiteboard exercise Play

Problem assumptions Class activity Play

Problem assumptions Whiteboard presentation Play

Proofs and assumptions Student activity Play

Proofs and assumptions Whiteboard exercise Play

Sum of the angles in a quadrilateral Simulation Play

The sum of the interior angles of a quadrilateral – proof Animation Play

Theorem – assumptions and claim Student activity Play

Theorem – assumptions and claim Whiteboard exercise Play

Theorems and their assumptions in algebra Whiteboard exercise Play

Theorems and their assumptions in algebra Student activity Play

Theorems and their assumptions in geometry Whiteboard exercise Play

Theorems and their assumptions in geometry Student activity Play