A no-prep, 6-lesson science unit on KS3 Biology: variation between species and between individuals of the same species; changes in the environment may leave individuals within a species, and some entire species, less well adapted; heredity as the process by which genetic information is transmitted from one generation to the next; the variation between individuals within a species being continuous or discontinuous; differences between species; evolution by natural selection, written for Key Stage 3, Years 7-9 (ages 11-14). Phenomenon-first and three-dimensional: every lesson opens with something to wonder about and builds toward the unit’s big question. Open and teach — full teacher plans, projectable slides, three differentiated pupil worksheets per lesson, a complete printable lab pack, a knowledge organiser, and a baseline + end-of-unit assessment.

Big question: How do we know living things have changed over time, and how does that change happen?

What’s included

• 6 × Teacher lesson plans (Word) on the 5E spine (Engage · Explore · Explain · Elaborate · Evaluate)
• 6 × Pupil worksheets in 3 differentiated tiers (Support / Core / Stretch)
• 6 × Projectable slide decks (PowerPoint, 16:9 widescreen)
• 1 × Full lab pack (Word) — investigation question, fair-test variables, household and lab equipment lists, a real risk assessment, a blank results table, and analysis + conclusion scaffolds
• 1 × Knowledge organiser (Word, A4 landscape)
• 1 × Baseline + end-of-unit assessment with a teacher answer key and three-dimensional items
• Hand-coded diagrams with clear labels for the unit’s key ideas — never AI-generated
• Original illustrations for every phenomenon hook

Lesson outline

1. Evidence from fossils
2. Evidence from anatomy
3. Evidence from embryos
4. Natural selection
5. Adaptation and changing populations
6. Artificial selection