Dangers due to discharge sparks Whiteboard exercise Play

Decoding a message Whiteboard exercise Play

Decoding a message Student activity Play

Definition of enlargement Student activity Play

Definition of trigonometric functions Student activity Play

Derivation of the formula Animation Play

Derivative of the function at a point Whiteboard exercise Play

Derivative of the function at a point Student activity Play

Deriving Cartesian equations of a locus Student activity Play

Describing the route of the ant Student activity Play

Describing the route of the ant Whiteboard exercise Play

Determining the formula of potassium carbonate Animation Play

Dielectric constant Animation Play

Dielectric constant Animation Play

Dielectric constant Whiteboard exercise Play

Dielectric constant Student activity Play

Different types of point mutations Whiteboard exercise Play

Diffraction of waves and Huygens' Principle Student activity Play

Diffraction of waves and Huygens' principle Animation Play

Diminution Animation Play

Direct current meters Slideshow Play

Direct electric current Student activity Play

Direct electric current Whiteboard exercise Play

Direct proportionality models Whiteboard exercise Play

Direct proportionality models Student activity Play