Direct current circuit Whiteboard presentation Play

Direct current circuit Class activity Play

Direct current meters Slideshow Play

Direct current transmission lines Animation Play

Direct current transmission lines Whiteboard exercise Play

Direct current transmission lines Student activity Play

Direct electric current Student activity Play

Direct electric current Whiteboard exercise Play

Direct ELISA technique Animation Play

Direct evidence for the structure of the inside of the Earth Slideshow Play

Direct proportion Whiteboard presentation Play

Direct proportion Whiteboard exercise Play

Direct proportion Class activity Play

Direct proportionality Whiteboard exercise Play

Direct proportionality models Whiteboard exercise Play

Direct proportionality models Student activity Play

Distilled water Illustration Play

Does chemically pure water conduct an electric current? Student activity Play

Does chemically pure water conduct an electric current? Simulation Play

Domestic circuits Simulation Play

Earthing, threats Animation Play

Earthing, threats Whiteboard exercise Play

Earthing, threats Student activity Play

Eddy currents Animation Play

Eddy currents Student activity Play