Compose a proof Student activity Play

Compose a proof Whiteboard exercise Play

Constructing a proof from a demonstration Whiteboard exercise Play

Constructing a proof from a demonstration Student activity Play

Counterexamples and proofs Whiteboard exercise Play

Counterexamples and proofs Student activity Play

Deductive reasoning Whiteboard presentation Play

Deductive reasoning Class activity Play

Demonstration or proof? Animation Play

Demonstration or proof? Student activity Play

Diagrams of geometric sequences and series Whiteboard exercise Play

Diagrams of geometric sequences and series Student activity 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 Student activity Play

Example as a proof Whiteboard exercise Play

Example of proof Animation Play

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

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