Some time in Year 9, most schools ask families to choose between combined science and triple science. Some schools decide for you based on sets. Either way, it is worth understanding what the choice means, because it affects your child’s timetable for two years.
The examples here use AQA, the most common exam board. Other boards work in a similar way.
The short version
- Combined science is worth two GCSEs. Triple science is three separate GCSEs: Biology, Chemistry and Physics.
- Triple covers more content and more exam time, and usually takes up one of your child’s option slots.
- Combined science does not stop your child taking science A levels. Many sixth forms accept it with good grades.
- Choose triple for genuine interest and strength in science, not only because it sounds more impressive.
The basic difference
Combined science covers all three sciences and leads to two GCSE grades, awarded together, such as 7-7 or 6-5. With AQA’s Combined Science: Trilogy, students sit six papers, two each in Biology, Chemistry and Physics. Each paper is 1 hour 15 minutes.
Triple science (sometimes called separate sciences) leads to three full GCSEs. With AQA, each science has two papers of 1 hour 45 minutes. That is a lot more time in the exam hall, and there is more content to learn, particularly in Physics and Chemistry.
| Combined science (AQA Trilogy) | Triple science (AQA) | |
|---|---|---|
| GCSEs | Two | Three |
| Papers | Six, 1 hour 15 minutes each | Six, 1 hour 45 minutes each |
| Grades | A double grade, from 1-1 to 9-9 | Three separate grades, 1 to 9 |
| Tiers | Same tier for all papers | Tier can differ between the three sciences |
| Timetable | Core subject | Usually takes one option slot |
Tiers
Both routes have Foundation and Higher tiers. For combined science, Foundation goes up to 5-5 and Higher runs from 4-4 to 9-9, and your child sits the same tier in all six papers. For triple science, the tier is decided separately for Biology, Chemistry and Physics, which can suit a child who is strong in one science and less confident in another.
Does it matter for A levels?
This is the question I am asked most. For most students, no. Plenty of sixth forms accept combined science for A level Biology, Chemistry or Physics, usually asking for a good double grade, such as 6-6 or 7-7. Check the entry requirements for the sixth forms your child is likely to apply to, because some selective sixth forms do prefer triple.
What matters more is the grade. A strong combined science result is a better foundation than a weak triple one.
What about medicine?
Medical schools look at GCSE results, but they do not generally require triple science. What they want is strong grades overall, and then the right A levels, usually Chemistry and often Biology. The UCAT and interviews come later, in Year 12 and 13. If your child is set on medicine, triple science is a good choice if they enjoy it and can do well in it. It is not the gatekeeper some parents fear.
Choose the route your child can do well in. A top grade in combined science opens more doors than a stretched grade in triple.
Manju Pillai
Questions to ask at your child’s school
- Is triple science an option choice, or decided by set?
- Does it take extra lesson time, or the same time with more content?
- Which tier do you expect my child to sit, and when is that decided?
- What does your sixth form ask for to study science A levels?
How we help
Our secondary tutors teach GCSE science in small groups, with work matched to your child’s board and tier. We start with an assessment, so we can see exactly which topics need attention before we build a plan.
Looking for GCSE help?We teach Maths, English and the three sciences from Year 7 to Year 11, face-to-face in Purley or online.
Can my child switch from triple to combined later?
Often yes, because the content overlaps. Ask the school, as each handles it differently and some have a cut-off point.
Is triple science harder?
There is more content and more exam time, and some topics go deeper. Students who enjoy science often find it more interesting rather than harder.
Will universities prefer triple science?
For most courses, they look at the grades and the A levels, not whether science was double or triple.
