The Law of Wave Refraction Student activity Play

The Law of Wave Refraction Animation Play

The length of a vector on the plane Animation Play

The magnitude of a vector on the plane Student activity Play

The magnitude of a vector on the plane Whiteboard exercise Play

The maze Game Play

The missing brackets Whiteboard exercise Play

The missing decimal Whiteboard exercise Play

The missing exponent in a quotent Whiteboard exercise Play

The missing fraction Whiteboard exercise Play

The missing numbers Game Play

The missing numbers in the expressions Whiteboard exercise Play

The missing signs Whiteboard exercise Play

The money spent by Lena Whiteboard exercise Play

The notion of a half-plane Student activity Play

The notion of a half-plane Whiteboard exercise Play

The number of zeros Whiteboard exercise Play

The order of operations Whiteboard exercise Play

The paths of the plane Whiteboard exercise Play

The pieces of chocolate Whiteboard exercise Play

The pieces of chocolate on three plates Whiteboard exercise Play

The pieces of chocolate on two plates Whiteboard exercise Play

The power before all other operations Whiteboard exercise Play

The power before all other operations Student activity Play

The power in an arithmetic expression Whiteboard exercise Play