Edexcel AS Biology A, memorised in year one.

4 topics across 69 subtopics, examined as its own qualification, specification 8BN0. They are all listed on this page, and each one opens to the subtopics inside it. The full topic list is Lifestyle, Health and Risk, Genes and Health, Voice of the Genome, Biodiversity and Natural Resources.

No. AS was decoupled in England in 2015, so Edexcel AS Biology A (8BN0) is a separate qualification and none of its marks carry into the 9BN0 A level. It is still the same content though, which is why revising it well sets up the second year.

AS is the first-year units only. The A level adds 4 further topics, among them On the Wild Side, Immunity, Infection and Forensics, Run for Your Life, and expects you to connect them back to the AS material. Work the AS content here, then move up to the full A level page when you start the second year.

Normally at the end of Year 12, in the summer series. That gives you one year to memorise 1,038 questions' worth of material, which is roughly 5 questions a day across an academic year if you start in September.

By retrieval, not rereading. Cover the answer, pull it from memory, then check. Levo runs that loop across all 4 AS topics and brings each question back on a spaced schedule, so what you learn in September is still there in June.

Yes, and it is the mistake most students make. The A-level papers examine this content again from scratch, and because the AS marks do not carry over, the only thing your first year leaves you with is what you still remember. Keeping it on a spaced schedule through Year 13 costs far less than relearning it.

1,038, written from the 9BN0 subject content and grouped into 69 subtopics so you can work one small area at a time rather than a whole topic at once.

Yes. Pick your subject, choose the AS topics on the topic screen, and every mode — the 3-step method, Cram, Blank Blitz, Build It and Test It — works only that material. Add the second-year topics when you get to them.