OCR GCSE Combined Science Tutors: J250 and J260

OCR GCSE Combined Science is a double-award qualification published as two separate specifications: Gateway Science Suite Combined Science A, code J250, and Twenty First Century Science Suite Combined Science B, code J260. Both award 360 marks and two GCSE grades, and OCR published grade boundaries for both in the June 2026 series. J250 divides that total across six papers of 60 marks and 1 hour 10 minutes; J260 uses four papers of 1 hour 45 minutes.

Which OCR Combined Science Is On Your Child's Statement of Entry?

Two Combined Science specifications have run side by side at OCR since first assessment in 2018, and they are not two names for one course. Gateway Science Suite Combined Science A carries the specification code J250 and the Ofqual qualification number 601/8687/2. Twenty First Century Science Suite Combined Science B carries J260 and 601/8690/2. Each is a Level 1/Level 2 GCSE (9-1) worth two GCSE grades, and each has its own accredited specification document, its own papers and its own grade boundaries.

The reliable way to tell them apart is the component code printed on a statement of entry or a results slip. The digits after the slash overlap, because both suites number from 01, so it is the J250 or J260 before the slash that identifies the specification. A component numbered 09 or higher can only be Gateway: J250 runs from J250/01 to J250/12, while J260 stops at J260/08.

The editions in force on 26 September 2026 are both numbered Version 5.0, dated May 2026 for J250 and June 2026 for J260. Both documents open with the same note about the awarding body itself: "As of September 2025, our name is Cambridge OCR." Older papers, mark schemes and school letters will still say OCR, and the specification codes have not changed.

A school chooses one suite for a cohort; a student does not choose between them. If the entry code is not to hand, the school's science department will confirm it in a sentence, and it is worth asking before buying a revision guide, because the two suites organise their content differently. For how Combined Science works as a qualification across the exam boards and the UK nations, see our GCSE Combined Science overview.

How Many Exams Will Your Child Sit, and How Long Is Each One?

Gateway J250 splits each science into two papers and examines them separately. Every one of the six is 60 marks, lasts 1 hour 10 minutes and is worth 16.7 per cent of the qualification. Papers 1 to 6 are the Foundation tier set and papers 7 to 12 the Higher tier set, so a student sits six papers whichever tier they are entered for.

Twenty First Century J260 does the opposite. It gives each science one long paper covering all six of its chapters, then adds a fourth paper of its own. Components 01 to 04 are the Foundation tier set and 05 to 08 the Higher tier set.

The totals are the point. Six papers of 60 marks is 360 marks; 95 plus 95 plus 95 plus 75 is also 360. Six sittings of 70 minutes is 420 minutes; four sittings of 105 minutes is also 420 minutes. Both OCR routes ask for exactly seven hours in an exam hall and award exactly two grades out of 360 marks. What differs is the shape of those seven hours, and for a student who tires in long papers or who needs the recovery time between short ones, the shape matters more than the total.

The content headings differ too. J250 has six teaching topics for each science plus a practical skills topic, CS7, which is examined inside every paper. J260 has twenty teaching chapters, six per science plus two general ones: BCP7 Ideas about Science and BCP8 Practical skills, both of which are assessed in all four papers. Our tutors plan a programme around whichever of these two shapes a student is entered for; you can book a free consultation to set that up.

What Is the J260 Paper That Assesses All Content?

Component J260/04, and J260/08 at Higher tier, has no counterpart on Gateway. OCR's specification overview lists what the first three papers cover, chapter by chapter, and then describes the fourth in four words: "Paper 4 assesses all content." It is 75 marks, 1 hour 45 minutes, and the only component on either OCR Combined Science suite that is not restricted to one science.

Nothing on J250 works this way. Each Gateway paper is bounded to three topics of a single science plus CS7, and the synoptic element that papers 2, 4 and 6 carry is defined in the specification as connections "within and between, though not across, different areas of each science discipline". A Gateway student never sits a paper that can move between biology, chemistry and physics in consecutive questions. A Twenty First Century student sits one every series, and it is the last paper of the four.

Two OCR documents give that paper two different weightings, which is worth knowing before a revision plan is built around either. The accredited specification, Version 5.0 dated June 2026, states 20.8 per cent in both its component overview and its assessment-objective table. OCR's specification-at-a-glance web page, read on 26 September 2026, shows 20.08 per cent against the Foundation component and 20.0 per cent against the Higher one. The mark allocation settles which figure is consistent with the exam: the paper is 75 marks of a 360-mark qualification, and 75 divided by 360 is 0.2083, or 20.83 per cent. The specification's 20.8 per cent is the rounded form of that; the 20.0 per cent on the web table is not.

In the June 2026 series the Foundation version of this paper needed 47 of its 75 marks for grade 5-5 and 40 of 75 for grade 4-4. Those are component boundaries rather than qualification grades. OCR calculates the overall grade by adding a learner's marks from the four components to give a total weighted mark, then comparing that against the qualification-level boundaries for the entry option and the exam series, so a strong performance elsewhere can compensate. The paper is still a fifth of the qualification, and a student who leaves it unrehearsed is leaving the widest-ranging paper on the specification until last.

Where Do the Analysis Marks Sit on Each OCR Route?

Both specifications set the same three assessment objectives and the same totals: AO1, recalling scientific ideas, techniques and procedures, at 40 per cent; AO2, applying them, at 40 per cent; and AO3, analysing information to interpret, evaluate, make judgements and improve experimental procedures, at 20 per cent. Each specification then publishes a table showing how those percentage points are distributed across its own components, and this is where the two routes separate completely.

Read the last two rows together. On J260, 8.30 of the qualification's 20 AO3 percentage points sit in the Combined Science paper alone. That is 41.5 per cent of every analysis and evaluation mark in the whole GCSE, concentrated in one 1 hour 45 minute sitting. The three single-science papers carry 3.90 points each, 11.70 between them. On J250 the same 20 points are spread at 3.33 per paper across six papers, totalling 19.98, and no Gateway paper carries more analysis weight than any other.

The same table shows the fourth paper inverting the other way on recall. Its AO1 share is 4.18 points against 11.94 in each single-science paper, so it is simultaneously the least memory-dependent and the most analysis-dependent component on either OCR suite. A student who can reproduce content but struggles to read a graph, judge an experimental method or weigh conflicting data will find that weakness spread thinly across six Gateway papers and concentrated into one Twenty First Century paper.

This is a statement about where marks are placed, not about which qualification is harder. The papers are different, the boundaries are set separately each series, and the two suites are not comparable on difficulty from their mark schemes. What the tables do support is a practical conclusion: on J260, practising data-response and evaluation questions is worth disproportionately more than it is on J250, and it is worth doing against past Combined Science papers specifically rather than against the single-science ones.

What Does Not Change Between J250 and J260?

Enough differs between the two suites to make the entry code worth knowing, but a parent reading the sections above could easily conclude that nothing is shared. Several of the things families ask about most are identical, and identical in the two specifications' own wording.

The practical requirement is the one worth dwelling on, because it is the part of GCSE science parents most often expect to be marked. It is not. Both specifications divide the Department for Education content into sixteen Practical Activity Groups, five in biology, five in chemistry and six in physics, and both state that completing at least sixteen practical activities is compulsory. Both also let the school choose which activities to run inside each group, provided every learner has the opportunity to use all the required apparatus and techniques. Nothing a student does in a lab carries a mark of its own; the practical work is assessed through written questions in the papers, on J250 through topic CS7 and on J260 through chapter BCP8.

Tiering works the same way on both, and the allowed grade is worth understanding before a tier decision is made. Foundation covers 5-5 to 1-1 and Higher covers 9-9 to 4-4, and a Higher candidate who falls a small number of marks short of 4-4 can be awarded an allowed 4-3 rather than nothing. In the June 2026 series that allowance sat at 113 of 360 on J250 Higher against 121 for 4-4, and at 99 of 360 on J260 Higher against 107 for 4-4.

Preparing for Six Short Papers Rather Than Four Long Ones

Our expert GCSE Combined Science tutors help students on both OCR routes at Foundation and Higher tier, and the first thing we establish is which specification the school has entered them for, because almost every practical decision follows from it. A Gateway programme is built around six discrete 70-minute papers, each self-contained enough that a student can be brought up to standard on one science at a time. A Twenty First Century programme has to prepare three 105-minute single-science papers and then the Combined Science paper, which cannot be revised by topic because it draws on everything.

Stamina is part of it. Moving a student from 70-minute to 105-minute papers is a different problem from teaching them the content, and on J260 it has to be solved four times over rather than six times at a shorter length. So is question style: the assessment-objective tables above mean that time spent on data interpretation, experimental evaluation and extended judgement questions pays back far more on J260 than the same time spent on recall, while on J250 the balance is even across every paper.

Retake rules differ in wording and in scale. J250 states that learners retake all the papers of the relevant tier, which means six papers. J260 states that learners retake all components in the tier of entry, which means four. Neither specification caps the number of retakes, and both require all papers to be taken in the same series at the end of the course, so a resit is a full re-entry rather than a repair of one weak paper. That makes the tier decision, taken long before the exams, one of the more consequential choices in the two-year course, and one our GCSE science tutors work through with a family at a free consultation before a tier is confirmed.

Where a student is strong in one science and weak in another, the separate sciences are sometimes the better route, and that is a conversation worth having early. We also tutor the three OCR separate science GCSEs: OCR GCSE Biology, OCR GCSE Chemistry and OCR GCSE Physics. Families comparing awarding bodies before a move can read our page on Edexcel GCSE Combined Science, which covers the 1SC0 structure in the same detail. The two OCR specifications themselves are published in full by the awarding body: Combined Science A (J250) and Combined Science B (J260).

Frequently Asked Questions About OCR GCSE Combined Science