KS3 Biology — Bacteria in the Digestive System — Extension Pack

🦠 Stretch high achievers further with four ready-to-use enrichment activities on bacteria in the digestive system — no preparation required. Bacteria are unicellular microorganisms, and while some cause disease, others such as gut flora are essential for digestion and health, and these tasks push students to apply that thinking, for KS3 students aged 11–14.

📦 What's included:

Vocabulary Matching (12 terms) — covering key terms including microorganism, pathogen, enzyme, gut flora, cytoplasm, competition, and fermented food, with a shuffled definition column and answer grid

Challenge Quiz (25 marks) — data interpretation from a table showing bacterial density across different parts of the digestive system, enzyme reuse, the difference between association and causation, newborn gut bacteria development, and a scientific debate on probiotics

Gut-Brain Axis Case Study (20 marks) — real research linking gut bacteria to mental health, evaluating a misleading media headline and distinguishing between association and causation

Teach It Back task — students write an accessible guide to gut bacteria for a Year 6 audience, assessed with a rubric covering content accuracy, language adaptation, and engagement

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

🎬 Watch the free video lesson: https://www.youtube.com/watch?v=LUK9uywIB_g

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

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

Price: £3