Key Idea: Paper 1 is a source paper: you get four sources on one narrow topic and answer four questions worth 24 marks in one hour. It does not test how many facts you memorised — it tests whether you can read a source carefully, judge how useful it is with OPVL, compare sources, and reach a judgement using both the sources and your own knowledge.
📜 2.3.1 — Reading and using sources in Paper 1
Every Paper 1 sits inside a prescribed subject — a narrow topic your class studied in depth long before the exam, such as "The move to global war." You do not choose it on the day: your teacher picked it, so you already know the background and just apply your source skills to the four sources in front of you.
The sources come in two kinds. A primary source was made at the time by someone who was there, like a 1938 diary entry, while a secondary source was written later by a historian looking back, like a 2005 textbook. One source is usually a picture or cartoon — a visual source — and it is marked exactly like the written ones. The four questions always run comprehension → OPVL → compare-and-contrast → judgement, rising from easy to hard.
- Structure: four sources, four questions, 24 marks, one hour.
- Prescribed subject: the narrow topic your class studied in depth; you don't pick it in the exam.
- Primary source = made at the time by a witness; secondary source = written later by a historian.
- Visual source (cartoon/photo/poster) is marked the same way as text sources.
- The four questions are always comprehension, OPVL, compare-and-contrast, and judgement, easy to hard.
🔍 OPVL and cross-referencing — the two core tools
The heart of Paper 1 is OPVL, a tidy way to weigh how useful a source is. Origin means who made it, what it is, and when. Purpose means why it was made and for whom. Value means what a historian can usefully learn from it. Limitation means what it cannot safely tell you — and you must tie that limitation back to the origin or purpose.
The golden rule: never just say "it's biased." Saying a source is biased earns nothing on its own — you must explain why the origin or purpose makes it biased and what that means for a historian. The second core skill is cross-referencing: putting two sources side by side to find where they agree (this is called corroboration, and it makes a claim look reliable) and where they disagree (explain the clash using their different purposes).
- Origin = who, what, when. Purpose = why, and for whom.
- Value = what it's good evidence for (a propaganda poster is great evidence of what a government wanted people to believe).
- Limitation = what it can't show — always linked to origin or purpose, never to "bias" alone.
- Cross-referencing = comparing two sources to spot agreement (corroboration) and disagreement.
- Corroboration between different source types is strong evidence, because they had no reason to copy each other.
✍️ Exam-ready answers
Source D is a private 1937 letter from a factory worker describing long hours making weapons. With reference to its origin, purpose and content, assess the value and limitations of this source for a historian studying rearmament. [4 marks]
🔒 Model answer plan
See the mark-by-mark plan — for / against / judgement, with marking guidance — in study mode.
Using the sources and your own knowledge, evaluate the view that fear of a strong neighbour was the main reason a state began rearming in the 1930s. [9 marks]
🔒 Model answer plan
See the mark-by-mark plan — for / against / judgement, with marking guidance — in study mode.
🎯 One-glance recall
What does OPVL stand for? Origin, Purpose, Value and Limitation — where a source is from, why it was made, what it's good for, and where it falls short. Master this first: it powers three of the four questions.
What is cross-referencing? Comparing two sources to find where they agree (corroborate) and where they disagree, then explaining the difference using their different purposes. It's the core of the 6-mark compare-and-contrast question.
Which question needs your own knowledge? Only the final 9-mark judgement question. Comprehension, OPVL and compare-and-contrast stay inside the sources; the judgement combines sources with facts you studied and ends in a clear verdict.
Marks and the "it's biased" trap Marks run comprehension (3–5), OPVL (4), compare (6), judgement (9) — match time to marks. Never stop at "biased": always link it to origin or purpose and say what it means for a historian.