The real unit structure, the Y100 essay, and the AS Level withdrawal — explained by specialist OCR tutors
Book a Free ConsultationOCR A-Level History is specification code H505 (qualification number 601/4701/5). It is built from three separately weighted unit groups — a British period study, a non-British period study, and a thematic study — worth 25%, 15% and 40% of the final grade, plus a 20%-weighted non-exam essay called Y100. That is a genuinely different shape from other exam boards' History A-Levels, and it is the shape this page explains: which of the 58 named topic options your child's school has chosen, what the Y100 essay actually requires, and why OCR is withdrawing the standalone AS Level (H105) after the 2026 academic year.
Every unit weighting, word count and date on this page is taken from OCR’s own specification documents.
Our OCR History tutors teach H505 itself — the British and non-British period studies, the thematic paper and the Y100 coursework essay — against the topic options a school has actually chosen.
Book a Free Consultation Message us on WhatsAppH505 has four assessed components. Three are written exams, sat at the end of Year 13; the fourth, Y100, is a non-exam essay marked by the school. The table below sets out the full structure, taken directly from OCR's specification-at-a-glance page.
| Component | Marks | Duration | Weighting | Choice from |
|---|---|---|---|---|
| Unit group 1 British period study and enquiry |
50 | 1 hour 30 minutes | 25% | 13 units |
| Unit group 2 Non-British period study |
30 | 1 hour | 15% | 24 units |
| Unit group 3 Thematic study and historical interpretations |
80 | 2 hours 30 minutes | 40% | 21 units |
| Y100 Topic-based essay (non-exam assessment) |
– | – | 20% | student’s own choice |
Two things follow from this structure that a generic "A-Level History" description misses. First, the weighting is uneven — unit group 3 alone is worth 40% of the grade, almost as much as unit groups 1 and 2 combined, so a revision plan that treats all three exam units equally is misallocating time. Second, 20% of the final grade is decided before the exam season even starts, by an essay that is marked in school rather than externally — which changes what "being ready" for the A-Level actually means at each stage of Year 12 and Year 13. For a broader introduction to A-Level History across exam boards, see our A-Level History tutoring page; this page covers what is specific to OCR.
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Leading Tuition's History specialists work with OCR's unit structure, the Y100 essay and the 200-year chronological-range rule every week. Our OCR History tutors teach the exact unit combination your child’s school has chosen.
OCR's A-Level History is not a modular pick-any-topic system. Across the three unit groups there are 58 named topic options in total — 13 in unit group 1 (British period study), 24 in unit group 2 (non-British period study), and 21 in unit group 3 (thematic study and historical interpretations) — and a school selects one option from each group for its cohort to study. A student sits three topics, not 58; the number that matters for tutoring is which three their school has picked, not the full list.
OCR does not leave that selection unconstrained. The specification requires that the three topics chosen across the three units have a combined chronological range of at least 200 years. In practice, this rules out combinations that sit too close together in time — three twentieth-century topics, for example — and usually pushes at least one of the three choices into an earlier period. Because schools fix the combination for their whole cohort rather than letting individual students choose freely, the first thing a tutor needs from a new OCR History student is not "what period do you like" but "which three units has your school entered you for, and do you have copies of the topic-specific content list your teacher has issued."
This matters practically because a tutor who assumes OCR History works like a "pick your favourite era" course will misjudge preparation time. Each of the 13, 24 and 21 named options is a fixed, examined unit with its own content list set by OCR — not a free essay topic — so effective tutoring starts from the specific unit combination a student has been entered for, confirmed against the school's own scheme of work, rather than from generic period revision.
Y100 is the fourth component of OCR A-Level History and the one most competitor listings skip entirely. It is a non-exam assessment — coursework, marked by the school rather than sat as a timed paper — worth 20% of the final grade. OCR's specification sets the essay at 3,000 to 4,000 words, and the topic is the student's own choice: it "may arise out of content studied elsewhere in the course," in OCR's own wording, meaning it does not have to be one of the 58 named unit options and can instead build on an area of particular interest that develops out of a student's other units.
Because Y100 is marked in-house rather than externally, the skills it rewards are different from exam technique: independent research, source evaluation across a sustained piece of writing, referencing, and the discipline of sustaining a single historical argument across 3,000 to 4,000 words rather than the shorter, timed responses required in the three written units. A student who is strong under exam conditions is not automatically strong at Y100, and vice versa — the two need to be prepared for separately, and a coursework-style essay this long benefits from staged drafting over weeks rather than last-minute exam revision.
Because the topic is the student's own choice, the most useful early support is not "here is the answer" but structured guidance on choosing a topic that is narrow enough to argue properly in 3,000 to 4,000 words, has accessible primary and secondary sources, and connects back to content the student has already studied so that examiner moderation has a clear frame of reference.
This is the most time-critical fact on this page. OCR is withdrawing the standalone AS Level History A (H105, qualification number 601/4843/3) after the next academic year. The final first teach date is September 2026, and the final assessment opportunity is June 2027 — with, in OCR's own words, "no resit opportunity after the final assessment opportunity." This affects only the standalone AS qualification, not the full A-Level (H505), which continues unaffected and is not being withdrawn.
In practice this means any school starting a new Year 12 cohort on the standalone AS in September 2026 is entering its final AS cohort. Those students must complete the AS and sit its final assessment in the June 2027 series; if a student does not pass first time, or needs to improve a grade, there is no resit opportunity after that series because the qualification itself will no longer be offered. Families weighing up a standalone AS (as a one-year qualification, or as a fallback if a student later drops History after Year 12) against going straight into the two-year full A-Level need to factor this cut-off into the decision now, not discover it partway through Year 12.
It is also the fact that makes this page genuinely OCR-specific rather than a generic "A-Level History" description with OCR's name attached: neither AQA nor Edexcel has announced an equivalent AS History withdrawal on this timeline, so a family researching "should we do the AS or go straight to A-Level" gets a different, board-specific answer depending on which exam board their school has entered them for.
The Y100 essay is 20% of the grade and the student picks the question. Our OCR History tutors supervise that choice and the 3,000–4,000 word draft alongside the examined units.
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"I cover all exam boards" is the most common claim on general tutoring marketplace profiles, and for many subjects it is close enough to true that it does not matter much which tutor a family picks. OCR A-Level History is one of the subjects where it does matter, because H505's structure creates specific pitfalls that a tutor who has only taught another board's History A-Level will not automatically know to check for.
Three examples. First, the 200-year chronological-range rule governing which combination of the 58 named topics a school can enter its cohort for — a tutor unfamiliar with this rule may prepare a student on the assumption that topic choice is free, when in fact the school's combination has already been fixed to satisfy OCR's spread requirement. Second, the Y100 essay's 3,000 to 4,000 word length and school-marked, coursework-style format is a different skill set from exam technique, and a tutor experienced only in exam-paper preparation may under-prepare a student for the sustained research and drafting Y100 actually requires. Third, the uneven weighting across the three unit groups — 25%, 15% and 40% — means unit group 3 carries almost as much weight as the other two combined, and a tutor unfamiliar with H505's specific structure may allocate revision time evenly across units instead of weighting it toward unit group 3.
By contrast, a tutor who has taught, for example, AQA's differently-structured History A-Level (see our AQA History tutoring page for that board's specific components) brings real exam-board experience, but not H505's experience specifically. Leading Tuition's OCR History tutors work with the H505 unit groups, the Y100 essay and the AS withdrawal timeline directly, and for students who go on to apply for History at Oxford, we also offer dedicated preparation for TARA, the assessment replacing the cancelled HAT from 2027 entry, which builds on the source-evaluation skills Y100 already develops.
OCR's A-Level History is specification code H505, qualification number 601/4701/5. It is built from three named unit groups — British period study and enquiry, non-British period study, and thematic study and historical interpretations — worth 25%, 15% and 40% of the final grade respectively, plus a 20%-weighted non-exam essay called Y100. Unlike a generic "A-Level History" description, H505 has a fixed structure with 58 named topic options across the three groups, and every marketplace tutor listing should be able to name it.
58 in total: 13 British period study options in unit group 1, 24 non-British period study options in unit group 2, and 21 thematic study options in unit group 3. Your child studies one option from each group — three topics in total, not all 58. OCR requires the three chosen topics to have a combined chronological range of at least 200 years, so the choice is not free-form; it has to satisfy that spread across the three units.
Y100 is OCR's non-exam assessment (NEA) for A-Level History H505: a 3,000 to 4,000 word essay worth 20% of the final grade, marked by the school rather than sat as a timed paper. The topic is the student's own choice and, per OCR's specification, may arise out of content studied elsewhere in the course. Because it is coursework rather than an exam, Y100 needs different preparation from the three written papers — research skills, source evaluation and extended academic writing rather than exam technique.
Yes. OCR is withdrawing AS Level History A (H105, qualification number 601/4843/3) after the next academic year. The final first teach date is September 2026 and the final assessment opportunity is June 2027, with no resit opportunity after that series. This only affects the standalone AS qualification — the full A-Level (H505) is unaffected and continues as normal. Families choosing between a standalone AS and the full A-Level should factor this cut-off into their planning now.
Four components make up the full grade: unit group 1 (British period study, 50 marks, 1 hour 30 minutes) is worth 25%; unit group 2 (non-British period study, 30 marks, 1 hour) is worth 15%; unit group 3 (thematic study, 80 marks, 2 hours 30 minutes) is worth 40%; and Y100, the non-exam essay, is worth the remaining 20%. That means 80% of the grade is exam-based across three written papers, and 20% is coursework marked by the school.
September 2026 is the last point a school can start a new cohort on OCR's standalone AS Level History A (H105). Any student beginning the AS course in September 2026 must sit the final assessment opportunity in June 2027, and OCR has confirmed there will not be a resit opportunity after that series. In practice this means schools starting Year 12 in September 2026 are the final AS cohort, and any student who does not pass first time has no second attempt at the AS itself.
Yes. OCR's specification requires the three topics selected across the British, non-British and thematic unit groups to have a combined chronological range of at least 200 years. That rules out combinations that sit too close together in time — three twentieth-century options, for example — and pushes most students toward at least one topic from an earlier period. Schools generally fix the three options a cohort studies, so a tutor needs to know which combination your child's school has chosen and whether it satisfies the 200-year rule.
Because H505's structure is genuinely different from other boards' History A-Levels: three separately weighted unit groups (25%/15%/40%) rather than two equal papers, a fixed 200-year chronological-range rule governing topic choice, and a 3,000-4,000 word Y100 non-exam essay marked by the school rather than externally. A tutor who has only taught, for example, AQA's two-paper Breadth and Depth structure will not automatically know OCR's unit weightings, the Y100 word-count rules, or how the chronological-range requirement constrains topic combinations.
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Our OCR History tutors already teach H505’s unit groups, the Y100 essay and the topic combinations schools actually choose.
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