Even and odd number of negative signs Whiteboard exercise Play

Exterior angle of a triangle Whiteboard exercise Play

Exterior angle of a triangle – exercises Student activity Play

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

Factor out the common factor – reversing a sign Student activity Play

Finding angles Whiteboard exercise Play

Finding the opposite event Whiteboard exercise Play

Finding the sign of the composite function Whiteboard exercise Play

Forces of action and reaction act in opposite directions Student activity Play

Forces of action and reaction act in opposite directions Whiteboard exercise Play

Forming code words Animation Play

Forming words Student activity Play

Gradient of a hill Simulation Play

Gradient of a road as a percentage Student activity Play

How do we write algebraic expressions? Student activity Play

How to know what transformation was used Animation Play

Image of a figure (reflection in the x-axis) Animation Play

Image of a figure (reflection in the y-axis) Animation Play

Interactions between ions of the opposite charge Animation Play

Interesting information Animation Play

Is it translation or rotation or reflection? Student activity Play

Modulus Animation Play

Monotonicity and the sign of the derivative Animation Play

Monotonicity of quadratic function and sign of derivative Whiteboard exercise Play

Morse's Alphabet Animation Play