An example of a proof Student activity Play

Analysing the assumptions of a theorem Animation Play

Congruent triangles Student activity 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

Mathematical statements Class activity Play

Mathematical statements Whiteboard presentation Play

Necessity of assumptions Whiteboard exercise Play

Necessity of assumptions Student activity Play

Niels Bohr assumption Animation Play

Niels Bohr assumption Whiteboard exercise Play

Niels Bohr assumption Student activity Play

Problem assumptions Class activity Play

Problem assumptions Whiteboard presentation Play

Proofs and assumptions Student activity Play

Proofs and assumptions Whiteboard exercise Play

The assumptions and the claim Animation Play

The assumptions and the claim of the theorem Whiteboard exercise Play

The hidden assumptions Animation Play

Theorem – assumptions and claim Whiteboard exercise Play

Theorem – assumptions and claim Student activity Play