A cardboard model of a prism Animation Play

A model electric motor Slideshow Play

A model of a morphine molecule Illustration Play

A model of the distorted space around the Sun Illustration Play

A rainfall model Student activity Play

A rainfall model Simulation Play

Absorption of food Student activity Play

Absorption of the products of protein digestion Animation Play

Absorption of the products of protein; carbohydrate and lipid digestion Student activity Play

Active site Animation Play

Active site of enzyme Illustration Play

Addition of a substrate for the enzyme Animation Play

Addition of antibody marked with an enzyme Animation Play

Addition of phosphorus Illustration Play

Alcoholic beverages Slideshow Play

Alcoholic fermentation (1) Student activity Play

Alcoholic fermentation (2) Whiteboard exercise Play

Alcoholic fermentation (2) Student activity Play

An atom and a nucleus Student activity Play

An atom and a nucleus Animation Play

Application of enzymes Slideshow Play

Applications of linear models Whiteboard exercise Play

Applications of linear models Student activity Play

Artificial DNA Student activity Play

Atomic number Student activity Play