National Curriculum
86 lessons across 16 units
This is the complete topic map for KS3 Biology— every part of the national curriculum for Key Stage 3, organised the way it's taught: 86 lessons across 16 units, from Body systems to Variation. Each topic below opens a focused revision lesson, so “what should we look at tonight?” always has an answer.
The course is organised into 16 units: Body systems (4 lessons), Cells (10 lessons), Classification (3 lessons), Climate and biodiversity (2 lessons), Digestive system (5 lessons), Ecosystems (14 lessons), Evolution (7 lessons), Gas exchange (4 lessons), Health and disease (6 lessons), Inheritance (4 lessons), Nutrition (6 lessons), Photosynthesis (4 lessons), Reproduction (7 lessons), Reproduction in plants (4 lessons), Respiration (4 lessons) and Variation (2 lessons). Together that's 86 lessons — the whole course, with nothing skipped and nothing added.
Little and often beats cramming. One topic a night, done properly — read it, try the questions, check yourself — moves a grade more than a weekend binge the week before the exam. The list above is deliberately complete so you can tick through it a topic at a time.
Start from what's coming up, not from the beginning. If a class test or mock is near, open the unit it covers and work through those topics first. Between assessments, work through units in order — later topics usually build on earlier ones.
For parents:you don't need to know the subject to help. Ask which topic tonight's lesson was, open it here, and let them teach it back to you — explaining something out loud is one of the most effective revision techniques there is. At KS3 the habit matters more than the coverage: little routines now are what GCSE revision gets built on.
KS3 Biology covers 86 topics across 16 units: Body systems, Cells, Classification, Climate and biodiversity, Digestive system, Ecosystems, Evolution, Gas exchange, Health and disease, Inheritance, Nutrition, Photosynthesis, Reproduction, Reproduction in plants, Respiration and Variation. Each topic on this page opens a focused revision lesson.
There are 86 topics in KS3 Biology, grouped into 16 units.
KS3 Biology follows the national curriculum, so it isn't tied to a specific exam board — boards like AQA and Edexcel set GCSE specifications (Key Stage 4), not KS3. This page lists the national-curriculum topics for KS3 Biology.