Edexcel · GCSE
174 lessons across 9 units
This is the complete topic map for the Edexcel GCSE Biology course — every unit and topic from the specification in one place: 174 lessons across 9 units, from Topic 1 – Key concepts in biology to Topic 9 – Ecosystems and material cycles. Each topic below opens a focused revision lesson, so revision can start from the course as the exam board organises it — not from a guess about what might come up. Lessons marked Higher cover content that only appears on Higher-tier papers; everything unmarked is for all students.
The course is organised into 9 units: Topic 1 – Key concepts in biology (21 lessons), Topic 2 – Cells and control (17 lessons), Topic 3 – Genetics (23 lessons), Topic 4 – Natural selection and genetic modification (14 lessons), Topic 5 – Health, disease and the development of medicines (30 lessons), Topic 6 – Plant structures and their functions (16 lessons), Topic 7 – Animal coordination, control and homeostasis (22 lessons), Topic 8 – Exchange and transport in animals (12 lessons) and Topic 9 – Ecosystems and material cycles (19 lessons). Together that's 174 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. Signed-in students see ticks appear on this page as topics are completed, so progress through the course is visible at a glance.
Edexcel GCSE Biology covers 174 topics across 9 units: Topic 1 – Key concepts in biology, Topic 2 – Cells and control, Topic 3 – Genetics, Topic 4 – Natural selection and genetic modification, Topic 5 – Health, disease and the development of medicines, Topic 6 – Plant structures and their functions, Topic 7 – Animal coordination, control and homeostasis, Topic 8 – Exchange and transport in animals and Topic 9 – Ecosystems and material cycles. Each topic on this page opens a focused revision lesson.
There are 174 topics in Edexcel GCSE Biology, grouped into 9 units. Some content is marked Higher tier and only appears on Higher-tier papers.
Yes — this page lists every unit and topic on the Edexcel GCSE Biology specification, in the order the exam board organises it. Nothing is skipped and nothing is added.