# Practical Examples and Resources for Using CBT Within Your Classroom. Here is an exercise that students could undertake after tackling simple ideas about waves in C2. The students are asked to review four methods for measuring the speed of sound. They produce short explanations to explain why each method works and present them (perhaps just one per student!). Explaining each method requires an understanding of wave behaviour at a conceptual level well above that required for the “starting gun smoke and sound” style experiment. You may end up with a truly “generative learning” lesson with plenty of testing and discussion to tease out the right explanations! ## 1. Speed of sound with smartphone {% embed url="" %} ## 2. Speed of sound with synchronised clappers {% embed url="" %} ## 3. Speed of sound with echo rhythm {% embed url="" %} ## 4. Speed of sound with toilet rolls {% embed url="" %} \
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