KS3 Biology — Multicellular and Unicellular Organisms — Extension Pack

🔬 Stretch high achievers further with four ready-to-use enrichment activities on multicellular and unicellular organisms — no preparation required. A unicellular organism is a living thing made of just one cell that carries out every life process by itself, while a multicellular organism is built from many different, specialised cells working together, and these tasks push students to apply that thinking, for KS3 students aged 11–14.

📦 What's included:

Vocabulary Matching (12 terms) — covering key words from cell wall to organ system

Challenge Quiz (24 marks) — multiple choice, true/false, and a data interpretation table comparing cell counts across different organisms

Thermophilic Bacteria Case Study (20 marks) — surviving in near-boiling hot springs, with six analysis questions on adaptations and the definition of a living organism

Teach It Back task — students plan a short video or poster explaining the cell-to-organism hierarchy to a younger pupil, assessed with a provided rubric

Full answer keys and marking guidance included for all four activities.

🎬 Watch the free video lesson: https://www.youtube.com/watch?v=x1g3h5OR99U

👩‍🏫 Google Classroom ready — copy the link straight into your assignment. Print as many copies as your class needs.

🔓 Pairs with the main 100-mark multicellular and unicellular organisms worksheet, also available as part of the Complete Lesson Pack. Save £1 buying the pack (£3 + £3 = £6 separately, £5 together).

Price: £3