An engaging lesson presentation (41 slides) and accompanying worksheet that looks at the different causes of variation and the different types of variation. The lesson begins by challenging the students to pick out a set of siblings from a series of pictures and then getting them to explain scientifically why they made the decision that they did. Moving forwards, students will recognise that one cause of variation is genes. Students are shown a pair of identical twins and asked to explain why they look different despite their identical genes so that they can understand that the environment also affects variation. Students will also meet discontinuous and continuous variation and will understand how this data should be represented. There are progress checks throughout the lesson to allow the students to assess their understanding.

This lesson has been designed for KS3 and GCSE students.

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  • Variation.pptx
  • Causes-of-variation.docx

About this resource


Created: Jun 8, 2017

Updated: Mar 8, 2019


pptx, 2 MB



docx, 14 KB


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