This is a fully-resourced lesson which includes an engaging and detailed lesson presentation and differentiated worksheets that together guide students through the key details of endothermic and exothermic reactions. This lesson has been designed for GCSE students but could be used with students entering this topic at A-level who are looking for a recap on the key details.
This lesson focuses on a few critical areas of these reactions and those which are often poorly understood. For example, considerable time is taken to ensure that students understand how energy is taken in to break bonds in a reaction and given out when bonds are formed. From this basis, they learn to compare the amount of energy taken in with the amount given out and ultimately determine whether it is an endothermic or exothermic reaction. The format of the lesson is that students are guided through the combustion of methane as an exothermic reaction and shown how to draw reaction profiles and calculate energy changes using the bond energies to prove it is that type of reaction. Having worked with the teacher and each other on this reaction, students are then challenged to bring their skills together to describe, explain and represent an endothermic reaction. If students feel that they will need some assistance on this task, the worksheet has been differentiated so they can still access the learning. There are a number of quick competitions written into the lesson to maintain engagement and also progress checks are found at regular intervals so students can constantly assess their understanding. The lesson finishes with a final game called The E factor which tests the students knowledge from across the whole lesson.
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