The sum of a convergent geometric series – applications in geometry Student activity Play

The sum of a convergent geometric series – squares Whiteboard exercise Play

The sum of a convergent geometric series – triangles Whiteboard exercise Play

The sum of a finite geometric series Student activity Play

The sum of a finite geometric series Animation Play

The sum of a finite geometric series – activity Whiteboard exercise Play

The sum of a finite geometric series – problems Student activity Play

The sum of a finite geometric series – problems Whiteboard exercise Play

The sum of a finite geometric series – problems Whiteboard exercise Play

The sum of infinite geometric series Whiteboard exercise Play

The three states of matter Animation Play

The three states of matter Student activity Play

The types of information exchanged by organisms Slideshow Play

The unit of capacitance Student activity Play

The  nth term rule for the geometric sequence Whiteboard exercise Play

Three tears Animation Play

Three typical shapes of histograms Animation Play

Torus Animation Play

Translation is a transformation Student activity Play

Translation, rotation and reflection Whiteboard exercise Play

Translations Student activity Play

Translations Simulation Play

Triangle tricks Animation Play

Trigonal pyramidal shape of ammonia Animation Play

Two perpendicular symmetry lines Animation Play