Crossing lines cut by two parallel lines Animation Play

Cube roots Student activity Play

DC supply Whiteboard exercise Play

DC supply Student activity Play

Decimal number line Whiteboard exercise Play

Decimal number line Student activity Play

Decimal number line Simulation Play

Defining inequalities in a coordinate system Student activity Play

Defining inequalities in a coordinate system Simulation Play

Defining inequality in a coordinate system Simulation Play

Different angles Student activity Play

Different vector equations of the same line Animation Play

Direct current transmission lines Whiteboard exercise Play

Direct current transmission lines Student activity Play

Direct proportionality models Student activity Play

Distance from a point to a line Simulation Play

Distance from a point to a line Student activity Play

Distance on the map Animation Play

Distances from the Earth Animation Play

Divide a plane into half-planes Student activity Play

Dividing a line segment Simulation Play

Dividing a line segment Student activity Play

Dividing a plane into half-planes Whiteboard exercise Play

Dividing a plane into half-planes Whiteboard exercise Play

Dividing by a power of x Whiteboard exercise Play