shampoo - is it worth the money or is cheap shampoo just as good?
investigation activity
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Typo on one of the last slides! It should read "except pH" and not "accept pH" Good resource. Easy to just pick up and use. Fits in with the "bad science" aspects of the new OCR GCSE course nicely!
A comprehensive PowerPoint guiding students through an engaging investigation. Liked the way the significance of each factor under test (pH, viscosity, and foam retention) was explained. Good analysis questions develop higher order thinking. Thank you.
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