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

Does the second derivative always give an answer? Student activity Play

Does zero in the denominator mean a vertical asymptote? Student activity Play

Dolly the sheep – reproductive cloning Student activity Play

Domain and periodicity of trigonometric functions Student activity Play

Dominant and recessive traits Student activity Play

Doped semiconductors Student activity Play

Doped semiconductors Student activity Play

Doppler effect for different waves Student activity Play

Dot plot Student activity Play

'Double quadratic' equations Student activity Play

Double-angle formula for the cosine Student activity Play

Double-angle formula for the sine Student activity Play

Double-angle formula for the tangent Student activity Play

Doubling time changes Student activity Play

Down the hill Student activity Play

Drag and drag coefficient Student activity Play

Drawing a circle Student activity Play

Drawing a hexagon inscribed in a circle Student activity Play

Drawing a line of best fit Student activity Play

Drawing a plan Student activity Play

Drawing a square inscribed in a circle Student activity Play

Drawing a triangle symmetrical to a point Student activity Play

Drawing an equilateral triangle inscribed in a circle Student activity Play

Drawing angles Student activity Play

Drawing angles Student activity Play

Drawing circuits Student activity Play

Drawing conclusions Student activity Play

Drawing dots Student activity Play

Drawing graphs Student activity Play