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Task: Answer questions about making a bike go faster. Assessment focus: friction; gearing.

Students suggest why two girls of the same weight go down a slide at different speeds, and then identify the forces acting on the girls. The assessment focus is on the forces of gravity and friction.

Task: Complete a graph from data in a table, and answer two questions. Assessment focus: speed and stopping.

Task: Students answer questions about what will make mountain bike riders go faster. Assessment focus: Air resistance.

Task: students, in small groups, discuss a concept cartoon about rolling cans, before making a prediction about which will roll further. Assessment focus: making predictions about friction.

Task: describe how different features of a racing car help it go fast. Assessment focus: technological responses to forces.