4 January 2026
Most schools offer two science routes: Combined (Trilogy) or Triple (Separate Sciences). Both end at the same GCSE standard but at different breadths. Here's how to choose.
What's the same
Both routes cover Biology, Chemistry, and Physics. Both are graded on the 9–1 scale (Combined gives a 9-9 to 1-1 double award; Triple gives three separate grades).
What's different
Triple covers more topics and goes slightly deeper, particularly in physics. It typically requires an extra option slot. Combined uses fewer option slots, freeing room for another subject.
Who should pick Triple
Students who plan to take any A-Level science, particularly chemistry or physics. Triple is also worth it if your child is strong at science and would enjoy the extra depth.
Who should pick Combined
Students who find science a bit of a slog, or who'd benefit from picking up an additional subject (e.g. a language, a creative subject, or an applied subject). Combined doesn't lock you out of A-Level science — strong Combined students can still take it.
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