Building a demonstration from a proof Student activity Play

Calculating Student activity Play

Calculating length Whiteboard exercise Play

Calculating length and distance Student activity Play

Changing fractions to decimals Whiteboard exercise Play

Changing the sign of an angle Student activity Play

Changing the sign of an angle in expressions Whiteboard exercise Play

Changing  +  to  – Whiteboard exercise Play

Changing  –  to  + Whiteboard exercise Play

Coffee Whiteboard exercise Play

Common factor Student activity Play

Commutative property Whiteboard exercise Play

Commutative property Student activity Play

Commutative property for multiplication and addition Whiteboard exercise Play

Commutativity of monomials multiplication Student activity Play

Commutativity of monomials multiplication Whiteboard exercise Play

Counting problems Class activity Play

Counting problems Whiteboard presentation Play

Cross-multiplication Student activity Play

Cross-multiplication Whiteboard exercise Play

Delicious meringues Whiteboard exercise Play

Determining the sign of the tangent Whiteboard exercise Play

Determining the signs of trigonometric functions Student activity Play

Difference of squares Student activity Play

Different questions about the same operation. How much more? How much less? Student activity Play