A KS3 ecosystem lesson which focuses on the impacts of reintroducing wolves into the UK. Learning Objectives: -To identify the social, economic and environmental impacts reintroducing wolves into the UK. -To explore how wolves can have a ‘butterfly effect’ on an ecosystem. Economic, social and environmental impacts card sort activity with scaffolded template, Yellowstone National Park example of positive impacts, and decision-making exercise with self-assessment at the end. Slides are annotated with the structure of the lesson and worksheets on separate powerpoint. Scaffolded to higher and weaker abilities.