How to draw a triangle symmetrical to a given point Animation Play

How to draw an angle? Animation Play

How to measure the pH? Animation Play

How to plot the graph, given the information Animation Play

In how many ways can it happen? Whiteboard exercise Play

In how many ways can it happen? Student activity Play

Independence of events Student activity Play

Indicators and pH Whiteboard presentation Play

Indicators and pH Class activity Play

Inscribing a square into a circle Whiteboard exercise Play

Interpretation of the results of acid-base titrations Student activity Play

Investigating the properties of liquids Student activity Play

Kelvin scale Animation Play

Kelvin's idea Animation Play

Lena's way Animation Play

Less and more probable events Student activity Play

Levers and pulleys Class activity Play

Levers and pulleys Whiteboard presentation Play

Life on land Class activity Play

Linear function y = ax and its graph Student activity Play

Logarithmic scale Whiteboard exercise Play

Logarithmic scale Student activity Play

Logarithmic scale Animation Play

Lottery tickets Whiteboard exercise Play

Map scale Animation Play