This lesson strengthens students’ practical microscopy skills by revisiting the main microscope parts and key safety rules before moving into essential KS3 maths‑in‑science skills. Learners practise converting between millimetres and micrometres, apply the magnification formula, and learn how to rearrange the equation to calculate the real size of a cell from an image.

The lesson includes peer and group learning, mini tasks, and a print‑ready worksheet with an adaptive version to support all learners. It builds confidence in scientific calculation and prepares students for more advanced microscopy work in later years.

Students will be able to:

• Recall microscope parts and safety rules
• Convert between millimetres and micrometres
• Use the magnification formula
• Rearrange the formula to find real cell size

**Some visuals in this resource were made with AI to help bring ideas to life and support student understanding.