A matchstick proof Animation Play

A proof for rapid exchange of hydrogen atoms in hydroxyl groups Slideshow Play

A triangle and circles Student activity Play

Adding a side to a polygon Animation Play

Algebraic geometric series Student activity Play

Algebraic geometric series Whiteboard exercise Play

Algebraic geometric series Whiteboard exercise Play

An example of a proof Student activity Play

Angle sum of a triangle – observation and proof Student activity Play

Angles of a quadrilateral – proof Animation Play

Applications of geometric sequences Whiteboard exercise Play

Applications of geometric sequences Student activity Play

Applying the linear equation Student activity Play

Areas of geometric figures Student activity Play

Building a demonstration from a proof Student activity Play

Building a demonstration from a proof Whiteboard exercise Play

Building a proof Student activity Play

Building a proof Whiteboard exercise Play

Building a proof from a demonstration Student activity Play

Building a proof from a demonstration Whiteboard exercise Play

Building a proof from deductions Whiteboard exercise Play

Building a proof from deductions Student activity Play

Chemical and physical properties of geometric isomers Slideshow Play

Compose a proof Student activity Play

Compose a proof Student activity Play