Critical mass Student activity Play

Decreasing pressure Student activity Play

Defining inequalities in a coordinate system Simulation Play

Defining inequalities in a coordinate system Student activity Play

Defining inequality in a coordinate system Simulation Play

Definite integral of a linear function Animation Play

Definite integral of non-negative function Animation Play

Definition of pressure Student activity Play

Definition of pressure Glossary Play

Definition of pressure Whiteboard exercise Play

Definition of the definite integral Animation Play

Demonstration of the formula for the area of a triangle Whiteboard exercise Play

Demonstration or proof? Animation Play

Demonstration or proof? Student activity Play

Derivatives of the trigonometric functions in geometry Animation Play

Deriving the formula for the surface area of a sphere Animation Play

Difference of squares Student activity Play

Dimensions of the figure Animation Play

Dividing into a given ratio Student activity Play

Drag force Whiteboard exercise Play

Drawing a parallelogram Whiteboard exercise Play

Drawing a parallelogram and calculating its area Whiteboard exercise Play

Drawing a polygon Whiteboard exercise Play

Drawing a polygon Whiteboard exercise Play

Drawing pins Animation Play