Peer assessment — evaluating a classmate's work against a mark scheme — is one of the highest-impact study strategies when done properly. The Education Endowment Foundation estimates it can produce learning gains equivalent to around eight months of additional progress, because marking someone else's work forces you to apply the exact criteria you need to meet in your own.
Why does peer assessment improve your own learning?
When you assess a classmate's essay, answer, or diagram, something important happens: you must shift from being the producer of work to being the evaluator of it. This change of perspective forces you to engage with the assessment criteria at a deeper level than simply reading them.
Specifically, peer assessment helps you:
- Understand what "excellent" looks like by seeing a range of responses
- Identify features that earn marks and features that do not, in a way that is easier to see in someone else's work than your own
- Internalise the mark scheme, so you begin to apply it automatically when writing
- Develop the language of evaluation (specific, evidence-based feedback rather than "this is good" or "this is wrong")
This is why many teachers include peer assessment as a regular classroom activity — the student who does the marking often benefits as much as the student whose work is being marked.
How do I give useful peer feedback?
Vague feedback helps no one. "Good effort" or "needs more detail" tells the writer nothing they can act on. Useful peer feedback is:
- Specific about what is present. Name the thing that works: "You have used the term 'genotype' correctly in the second paragraph and linked it to the Punnett square."
- Specific about what is absent or wrong. Not "your explanation is incomplete" but "you have described what happens (the alleles separate) but not explained why it matters for inheritance."
- Referenced to the mark scheme or success criteria. "The mark scheme asks for three causes — you have given two, so one mark is not yet secured."
- Actionable. End with a suggested next step the writer can take immediately: "Add a third cause with a linking sentence to secure the third mark."
A widely used structure for peer feedback is: What Went Well (WWW) — one or two strengths, specific and evidenced — and Even Better If (EBI) — one specific, actionable improvement.
How do I use a mark scheme when peer assessing?
Mark schemes can look intimidating, but they are structured to be readable once you know how:
- Read the mark scheme before marking. Understand the marking points, not just the number of marks. Note whether marks are awarded for specific terms, correct structure, or number of points.
- Go through the work line by line. Do not form an overall impression and then score it — mark each section against the mark scheme criteria before reaching a total.
- Mark up the work directly. Use a different colour pen (or add comments) to indicate where each mark is or is not earned. Write the criterion next to the relevant section.
- Assign a mark and a reason. Do not just write "3/6" — write "3/6 because marking points 1, 3, and 5 are present; marking points 2, 4, and 6 are absent."
- Write the WWW/EBI comment after completing the line-by-line marking, not before.
What kinds of work are most useful to peer assess?
| Type of work | Why peer assessment helps |
|---|---|
| Extended writing (essays, source analyses, case studies) | Reveals how a different student structured the same argument; highlights mark scheme compliance |
| Short-answer exam questions | Shows whether the right terminology and level of detail are present |
| Maths worked answers | Reveals error patterns in working — where method marks are lost |
| Diagrams and label questions | Shows whether labels are correct and complete |
| MFL written tasks | Highlights vocabulary errors and grammar patterns that are hard to see in your own work |
How should I receive peer feedback without dismissing it?
Receiving feedback from a classmate can feel awkward — you may assume they have got it wrong, or feel embarrassed if errors are pointed out. A more useful frame: peer feedback is data, not judgement. Your job as the writer is to evaluate whether the feedback is accurate and specific.
- Check the feedback against the mark scheme yourself. If a classmate says a mark point is missing, look at the mark scheme and check. Sometimes they are right; occasionally they have misread the criteria.
- Focus on feedback that is specific and evidenced. Vague feedback ("this paragraph is confusing") may be true but is hard to act on. Specific feedback ("you have not explained the link between X and Y") is actionable.
- Write a response to the EBI comment. Immediately after receiving peer feedback, spend five minutes attempting to improve the piece based on the specific suggestion. This is the most productive use of the feedback — not just reading it, but implementing it.
Frequently asked questions
Is peer assessment reliable — what if my classmate marks it wrong?
Peer assessment is less reliable than teacher marking, particularly in the early stages. To reduce errors, always pair peer marking with a mark scheme that has clear, specific criteria. After peer marking, many teachers reveal the correct marks — use this as a calibration exercise. Over time, as you both become more familiar with the mark scheme, reliability improves.
Can I peer assess my own work (self-assessment)?
Yes, and self-assessment is the natural extension of peer assessment. The process is the same — mark your own work against the mark scheme, line by line, as if you were marking a stranger's work. Students consistently give themselves higher marks than they deserve when they know the work is theirs, so be strict: a mark point must be genuinely present, not almost-present.
What if my classmate gives me feedback I disagree with?
Discuss it. Peer assessment is most effective when it involves a brief conversation — "I thought this section covered the point, but you marked it as missing — can you show me where in the mark scheme?" This kind of dialogue builds a shared understanding of what quality looks like, which benefits both students.
How is peer assessment different from just having a study partner?
A study partner helps you prepare — you quiz each other, check each other's understanding, study together. Peer assessment is specifically about evaluating completed work against explicit criteria. The two complement each other well: peer assessment after producing written answers, study partner work when learning content.
For a Socratic AI tutor that gives precise, specific feedback on your answers — pointing to what is earning marks and what is not, just as a mark scheme would — visit aitutors.me.