Scheme of Work Cambridge International as & a level

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Learners undertake a practical investigation into the effect of light intensity, temperature or carbon dioxide concentration on the rate of photosynthesis. Information is provided at: www.saps.org.uk/secondary/teaching-resources/190-using-pondweed-to-experiment-with-photosynthesis. For example, learners observe the effect of changing light intensity on the rate of photosynthesis of an aquatic plant. An activity that uses unicellular algae such as Chlorella immobilised in alginate beads to investigate photosynthesis is at:

Use a technique called ‘rainbow grouping’ to help learners share their practical experiences. Give learners a number or colour. Learners with the same number or colour then join up, making groups of representatives of each original group. In their new group, learners take turns to describe and explain the data they collected, and evaluate sources of error in the investigation.