Definition of trigonometric functions Student activity Play

Degree measure Animation Play

Degree measure Student activity Play

Degree measure Whiteboard exercise Play

Degrees – activity Whiteboard exercise Play

Degrees, minutes and seconds Whiteboard exercise Play

Demonstration of a theorem Animation Play

Demonstration or proof? Student activity Play

Demonstration or proof? Animation Play

Derivation of the formula Animation Play

Determining angles Whiteboard exercise Play

Determining angles 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 angles Student activity Play

Differentiation rules (1) Class activity Play

Differentiation rules (1) Whiteboard presentation Play

Diffraction of electrons Whiteboard exercise Play

Diffraction of electrons – the Davisson-Germer experiment Student activity Play

Diffraction of X-rays Simulation Play

Diffraction of X-rays Whiteboard exercise Play

Diffraction of X-rays Student activity Play

Diffuse reflection Simulation Play

Diffuse reflection Student activity Play