Combined or triple science GCSE: which is right for my child?

Choosing between combined and triple science usually happens in Year 9, when options are picked. Many parents worry that combined science will close doors. In most cases it does not. Here is how the two routes compare, using the AQA specifications as the example.

What is the difference between combined and triple science?

Combined science covers biology, chemistry and physics and counts as two GCSEs. Triple science (also called separate sciences) is three full GCSEs: one each in biology, chemistry and physics.

Triple science goes into more depth and covers some extra topics. Combined science covers the core of all three sciences in less teaching time.

Sources: AQA Combined Science: Trilogy at a glance, AQA Biology at a glance and the AQA summer 2027 provisional timetable for chemistry and physics paper lengths.

Other boards, such as Pearson Edexcel and OCR, have their own versions with slightly different paper lengths. Check with your child's school.

How is combined science graded?

Combined science gets one "double grade" on a 17-point scale, from 9-9 down to 1-1. AQA explains that the double award is worth two GCSEs and is made of two equal or next-door grades, such as 7-7 or 7-6.

The grade comes from the total across all six papers. In June 2026, AQA Trilogy Higher tier needed 228 out of 420 for a 7-7 and 111 for a 4-4 (AQA grade boundaries, June 2026).

This matters because a weak physics paper is balanced by strong biology and chemistry papers. In triple science, each science is graded on its own. Our guide to GCSE grade boundaries explains more.

Does my child need triple science for A-Level science?

Usually not. Many sixth forms accept combined science for A-Level sciences, though often at a high grade.

For example, the London Academy of Excellence in Stratford, one of the most selective sixth forms in East London, accepts:

These are LAE's own rules, and each sixth form sets its own. Always check the entry requirements for the sixth forms on your list. See our guide to selective sixth forms in East London.

Even when combined science is accepted, the jump to A-Level is bigger. Students who took combined science may need to cover a few extra topics in the summer before Year 12.

Does it matter for the EBacc?

No. The government's EBacc guidance says pupils meet the science part either through combined science, or by taking three single sciences from biology, chemistry, physics and computer science.

Who is triple science a good fit for?

Triple science suits students who enjoy science, are working at grade 6 or above in science and maths, and are thinking about science or medicine later.

It usually means more science lessons, and in many schools it uses one of the option choices. That leaves less room for other subjects.

Combined science suits students who want a broad science education and more space for other options. It is also a sensible choice for students who find science hard, because the double grade spreads the risk across all three sciences.

Does my child get an equations sheet?

Yes, for physics. Ofqual requires exam boards to give equations sheets in GCSE physics and combined science for exams in 2025, 2026 and 2027, and has extended this to exams from 2028 for the life of the current qualifications.

Students still need to know when and how to use each equation. The sheet saves memorising, not understanding.

Can my child switch between combined and triple?

Sometimes, but it gets harder as the course goes on. Some schools move students between routes at the end of Year 10 based on progress. Ask the head of science what the school's policy is.

If your child is on combined science and wants to do A-Level science, focus on getting the highest double grade possible. A 7-7 or 8-8 opens many doors.

How do I help my child decide?

Ask three questions:

1. Do they enjoy science and want to study it after 16? If yes, triple may suit them.
2. What are their current science and maths grades? Strong maths helps a lot with chemistry and physics.
3. What would they give up? If triple takes an option slot, check what they would lose.

Then talk to your child's science teacher, who knows how they are working day to day.

How can LCB help?

Science lessons at LCB are taught in small groups of 3 to 5, in Barking or online, by tutors who studied at top UK universities. We teach both combined and triple science, matched to your child's exam board, and we know the required practicals and exam style well.

One parent from Canning Town told us her daughter went from a grade 5 to an 8 in Biology. We start with a free 30-minute assessment to find gaps and set a target. See our science tutoring and GCSE tutoring pages, or book a free assessment.