Demonstration or proof? Student activity Play

Demonstration or proof? Animation Play

Different ways of proving Animation Play

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

Divisibility by 8 Whiteboard exercise Play

Divisibility by 8 Student activity Play

Equal numbers – wrong steps in proof Whiteboard exercise Play

Example as a proof Whiteboard exercise Play

Example as a proof Student activity Play

Example of proof Animation Play

Experimental proof for the existence of dipole–dipole forces Student activity Play

Experimental proof for the existence of dipole–dipole forces Slideshow Play

Exterior angle of a triangle – observation and proof Student activity Play

Exterior angle of a triangle – proof Animation Play

Exterior angles in a triangle – proof Animation Play

Finding surds Student activity Play

Geometric problems Student activity Play

Impossible constructions Animation Play

Localisation of the median Student activity Play

Mathematical statements Whiteboard presentation Play

Mathematical statements Class activity Play

Mixed problems Student activity Play

One equals zero! Animation Play

Problem assumptions Class activity Play

Problem assumptions Whiteboard presentation Play