A plenary, starter or revision game to reinforce the difference between categoric and continuous variables, with examples of both types.

KS3 Biology. Activity to learn the parts of the Digestive system and their function. Can be used in a variety of ways: Slide 1&2 as a cut and stick; slide 1 for students to label what they know and find out what they don't know - possible homework. Class learning or revision activity - print out onto A3 and laminate the first slide, print the second onto card and cut out. Students work in pairs or groups to place cards onto the diagrams. This method works well as a game in the style of Beetle Drive, where they are put under time pressure and then have to move round to take up where another group have left off. The answer slide can be put up to check, or printed out and given to other students to check to make sure the first group to finish has completed the activity correctly. Rewards, forfeits, music all add to the fun. Can be used individually - look, cover, place, check.

KS3 Biology. Activity to learn the parts of the Respiratory system. Can be used in a variety of ways: Slide 1&2 as a cut and stick; slide 1 for students to label what they know and find out what they don't know - possble homework. Class learning or revision activity - print out onto A3 and laminate the first slide, print the second onto card and cut out. Students work in pairs or groups to place cards onto the diagrams. This method works well as a game in the style of Beetle Drive, where they are put under time pressure and then have to move round to take up where another group have left off. The answer slide can be put up to check, or printed out and given to other students to check to make sure the first group to finish has completed the activity correctly. Rewards, forfeits, music all add to the fun. Can be used individually - look, cover, place, check.

A range of concrete activites for students to explore the relationship between the size of particles or parts and the total surface area. Concept is important in explaining the function of alveoli in the lungs, villi in the intestine, particle size in reaction rate and catalysis. The concept can be explored at differentiated levels from the basic idea to deriving a quantitative relationship, depending on age, ability and context. Additional activities are included to demonstrate the functionality of moisture and thinness of the walls in the alveoli.