Reactions in the gaseous phase Student activity Play

Reactions of sugars Student activity Play

Reactions of the carboxyl group Student activity Play

Rectangles Student activity Play

Reduction of aldehydes and ketones (2) Student activity Play

Resonance energy for benzene Animation Play

Salts Class activity Play

Salts Whiteboard presentation Play

Secondary treatment Animation Play

Sexual reproduction in plants Class activity Play

Sexual reproduction in plants Whiteboard presentation Play

Silver halides in photography Student activity Play

Solving the integral Animation Play

Stoichiometric calculations Animation Play

Stoichiometric calculations Student activity Play

Structural isomerism in alkenes involving a positions of the double bond Student activity Play

Structural isomerism in alkenes involving a positions of the double bond Simulation Play

Sums of square roots of integers Student activity Play

Surds – the proof Animation Play

Surds – the proof (general case) Animation Play

The carbon cycle and human activities Slideshow Play

The chain rule Student activity Play

The denominator as a product of linear factors Animation Play

The denominator as a product of quadratic factors Animation Play

The double helix Student activity Play