Cutting a pyramid Animation Play

Decimal approximation of the square root of 5 Animation Play

Decimals Student activity Play

Deductions for algebraic transformations Student activity Play

Demonstration of a theorem Animation Play

Derivatives of powers with rational exponent Class activity Play

Derivatives of powers with rational exponent Whiteboard presentation Play

Detection of the ammonium ion Student activity Play

Determining the molarity of the hydrochloric acid Whiteboard exercise Play

Determining the molarity of the hydrochloric acid – summary Animation Play

Difference of squares Whiteboard exercise Play

Difference of squares Student activity Play

Difference of squares Student activity Play

Difference of squares Simulation Play

Different angles Student activity Play

Dimensions of the figure Animation Play

Discovering bases Student activity Play

Discovering bases Whiteboard exercise Play

Dissociation Animation Play

Dissociation constants of conjugate acids and bases Student activity Play

Dissociation constants of ethanoic acid and the ethanoate ion Animation Play

Dissociation constants of some bases Chart Play

Dissociation of a strong base Animation Play

Dissociation of a weak base Animation Play

Dissociation of acids, bases and salts Whiteboard presentation Play