SNAB Biology: Edexcel A-Level Biology A (9BN0)

SNAB stands for Salters-Nuffield Advanced Biology. It is the approach used in Pearson Edexcel A Level Biology A, specification code 9BN0, where each topic is taught through a real-life context such as heart disease or sports science. It is a linear A level assessed by three written papers at the end of Year 13.

The A level code is 9BN0. The three exam papers are 9BN0/01, 9BN0/02 and 9BN0/03. Use the code to find the right specification, past papers, mark schemes and pre-release articles on the Pearson website, because Biology B and the International A Level use different codes.

There are three written papers. Each lasts 2 hours, is worth 100 marks and counts for 33.33 percent of the A level. Paper 1 tests Topics 1 to 6, Paper 2 tests Topics 1 to 4, 7 and 8, and Paper 3 tests all topics with a section based on a pre-released article.

Pearson publishes the scientific article on its website 8 weeks before the Paper 3 exam. One section of Paper 3 is based on it. You cannot take the article into the exam, so read it early, learn its new terms, link it to the specification and practise questions on it.

There are 18 core practicals, from the effect of caffeine on Daphnia heart rate to habituation to a stimulus. They can be tested in any of the three papers, so you need the method, variables, risks, sources of error and the analysis for each one, not just the expected result.

Both are Pearson Edexcel A levels in biology. Biology A, known as SNAB, teaches each topic through a real-life context, while Biology B uses a more traditional, concept-led order. Papers, practicals and codes differ, so always check which specification your school has entered you for before revising.

It is demanding but manageable with steady work. Students usually find the volume of content, the precise terminology, the maths and statistics, and Paper 3 synoptic questions the hardest parts. Learning the specification wording, practising data questions and getting answers marked regularly makes the biggest difference to grades.

There is no fixed answer, because Pearson sets new grade boundaries for each exam series based on how hard the papers were. The same percentage can be a different grade in different years. Compare your past-paper scores with several recent sets of boundaries published by Pearson for 9BN0.

Pearson publishes grade boundaries for 9BN0 on its website after each results day. They change every year. Use them to convert your past-paper raw marks into a likely grade, and compare several years rather than relying on one, since a single series can be unusually high or low.

The specification names the chi-squared test, for comparing observed and expected results, and Student's t-test, for comparing two means, alongside correlation and measures of spread such as standard deviation. You should be able to choose a test, state a null hypothesis, use a critical value and conclude in words.

Use D equals N times N minus 1, divided by the sum of n times n minus 1, where N is the total number of organisms and n the number of each species. For species counts of 10, 6 and 4, D is 380 divided by 132, which is about 2.88.

Divide the rate of reaction at a temperature ten degrees higher by the rate at the lower temperature. If an enzyme reaction runs at 0.012 units per second at 25 degrees Celsius and 0.024 at 35 degrees, Q10 is 2.0, meaning the rate doubles for that ten-degree rise.

Learn the specification wording precisely, know all 18 core practicals in detail, practise every calculation and statistical test, and prepare the pre-release article as soon as it appears. Then do timed past papers and compare your answers line by line with the mark scheme, fixing repeated mistakes.

Most schools use the Pearson Edexcel A level Biology A (Salters-Nuffield) Student Books 1 and 2, which follow the 9BN0 topics in order. Use them alongside the specification itself, which lists exactly what can be examined, and past papers with mark schemes from the Pearson website.

Yes, private candidates can usually sit Pearson Edexcel A levels through an exam centre that accepts them, but the practical endorsement needs a centre that can assess practical work. Contact centres early about entry deadlines and practicals. A tutor can teach the content and core practical theory alongside.

A tutor can teach the theory behind each core practical, the 12 practical techniques, data analysis and evaluation, and help you write up your lab book. The endorsement itself is assessed by your teacher at your school or exam centre, so the practical work must be done there.

The hourly rate depends on the tutor and the length of each lesson. On FLN Tutors you see the rate on the course page before you book, and you pay only for the lessons you choose. Ask a question first if you want a lesson plan before deciding.

You get live one-to-one lessons with a biology tutor, homework and exam-style questions marked against Pearson mark schemes, worked solutions for calculations and statistics, help with the Paper 3 pre-release article and a revision plan focused on your weakest topics and papers.

You can ask a question or request a lesson from this page at any time. A tutor replies with a plan and suggested lesson times, usually starting with a short diagnostic of your weakest topics, so the first lessons go where they will lift your marks most.

Yes. Lessons are online, so students in international schools in the Gulf, India, Malaysia, Singapore and elsewhere can book times in their own time zone. If your school uses the International A Level rather than 9BN0, choose the IAL Biology course instead, as the papers differ.