Then you need a different guide. The separate sciences are examined on their own specifications, Biology (8461) among them, and they carry more biology than Trilogy does.

The one you want is AQA GCSE Biology, Higher.

AQA runs two combined science specifications. Combined Science: Trilogy is 8464, taught as three separate sciences, and that is the one this guide set covers. Combined Science: Synergy is 8465 and is taught as four integrated topics instead.

The code is on your exam timetable. If it says 8465 this is not your specification.

This is the Higher tier guide, offering grades 9-9 to 4-4 of the double award, with an allowed 4-3.

AQA sits the same numbered papers at either tier, so Biology Paper 1 and Biology Paper 2 is what you sit whichever tier you are entered for. The tier changes the content and the grades available, not the paper numbers.

Higher carries everything on the Foundation papers plus the higher-tier content, so a student later moved to Foundation has lost nothing.

Biology Paper 1 covers Cell Biology, Organisation, Infection and Response, Bioenergetics. Biology Paper 2 covers Homeostasis and Response, Inheritance, Variation and Evolution, Ecology.

The two papers divide the content between them. The full breakdown is here.

Yes, on the written papers. AQA does not assess them separately, so questions about method, apparatus, variables and results appear inside the topics: microscopy, microbiology and aseptic technique, osmosis, food tests, enzyme rate, photosynthesis rate, reaction time, plant responses, field investigations and decay.

Those questions are in the guide in the topics they belong to.

Yes, and they sit in the topics they belong to rather than being folded into theory: magnification and scale, surface area to volume, rate calculations from graphs, percentages and percentage change, ratios and probabilities in genetic crosses, and the statistics used on quadrat and transect data.

By subtopic, never by topic. The largest topic here is 217 questions, which is not a session. It divides into subtopics of 8 to 25 questions, and one of those is twenty minutes.

Any point in Year 10 or Year 11. Both papers are sat at the end of Year 11 and cover the full two years, so no part of the guide is too early.

The usual pattern is a subtopic in the week it is taught, then returns on days 1, 3, 7, 14 and 30.

Yes. This guide handles recall. Past papers handle the six-mark answers, the unfamiliar contexts and finishing the paper in the time. AQA publishes them free.

A PDF of 1,080 exam-style questions covering the whole of AQA GCSE Combined Science Trilogy Biology, Higher tier, with the answers printed after each topic.

It is not a textbook. It is the tool for getting taught content into memory and for showing whether it went in.

Three things decide it, and all three are on the exam timetable.

The route. Separate sciences, sat as three GCSEs, are Biology 8461 and its two siblings. Combined Science is a double award.
Which combined science. AQA runs Trilogy (8464) and Synergy (8465). They are different courses.
The tier. Higher offers grades 9-9 to 4-4 of the double award, with an allowed 4-3.

This guide is Combined Science: Trilogy, 8464, Higher tier.

There should be handwritten answers on paper and three passes over the same questions. The method produces two numbers each session, the score on the first closed-book pass and the score on the third. Those two numbers are a better thing to ask for than the number of hours spent.

Rereading and highlighting are the two most common revision activities and Dunlosky and colleagues rated both low utility in their 2013 review of ten techniques. They raise how familiar the material feels without raising the ability to produce it with the book shut.

The method page sets out what to do instead.

£7.00 for the whole specification at that tier. A GCSE biology revision guide is usually £6 to £10 and a full textbook £20 to £30. The three sciences within Trilogy are sold as three guides because chemistry and physics are examined on their own papers.

71 subtopics at roughly twenty minutes each is about 24 hours for a full first pass of the course. Returns afterwards are three to five minutes each.

That is your school’s decision and they will make it on mock performance. What is worth knowing is that Higher offers grades 9-9 to 4-4 of the double award, with an allowed 4-3 and Foundation caps at grade 5-5.

Higher content is a superset of Foundation content, so a student preparing on this guide who is later moved to Foundation has lost nothing.

Past papers, free from AQA, a calculator, and their own notes for anything not yet taught.