To model how natural selection affects population size.

This hands‑on lesson models how natural selection affects population size through an engaging, practical investigation. Pupils explore variation within a population, identify how certain traits improve survival, and develop a clear understanding of natural selection. The activity includes a strong working‑scientifically focus, guiding pupils to recognise controlled and uncontrolled variables, evaluate the reliability of their results, and comment on the degree of trust in their findings. With a structured lesson plan, discussion prompts and data‑collection opportunities, this resource supports deep scientific thinking and encourages pupils to pose new questions for further enquiry.