Before changing anything, it helps to be honest about where the time actually goes. In staff-room surveys across the UK, Singapore and Australia, the single biggest surprise is always the same: most of the time isn't the marking itself, it's the admin around it. Collecting books, opening to the right page, writing the date, hunting for the answer key, recording results into a tracker, and transferring comments into planners. Subtract those, and the actual per-question marking is small.
That matters, because it means the biggest wins don't come from going faster. They come from cutting the steps around the marking.
Where the time actually goes
A rough but representative breakdown for 30 pupils × 40-question arithmetic:
- ~15 min — collecting, sorting, and organising books.
- ~20 min — opening/flipping, comparing to key.
- ~35 min — ticking answers, circling mistakes.
- ~25 min — writing comments and "next steps".
- ~15 min — transferring scores into your tracker.
That's close to two hours for a single class, for a single maths lesson. Over the week, it's why "just one more thing to mark" eats every evening.
1. Mark as you go, not at night
The cheapest intervention is shifting marking into the lesson. Most maths lessons have at least one 10–15 minute independent practice block. Walking between pupils with a red pen and marking while they work has three benefits:
- You see the error in context — far more diagnostic than a tick at 9 pm.
- Feedback lands while the child still remembers what they were thinking.
- By the time books come in, half the marking is already done.
The classic objection is "I can't get round everyone." You don't have to. Pick a rotation, five pupils a day, targeted by need, and the whole class has had a live mark every week.
2. Use worksheet scanning
The biggest single leap today is OCR-based marking apps that read a photo of a worksheet and return per-question marks in under 30 seconds. For arithmetic, drill and booklet work, this turns most of that 35-minute "ticking" block into a few minutes of scanning and reviewing flagged answers.
Scanning doesn't replace professional judgement — it replaces the mechanical part of it. You still look at the flagged questions, you still decide what to do about them. You just don't spend your Sunday comparing 1,200 numbers to an answer key.
Try scanning a booklet this week
REDMARKER gives you 10 worksheet credits per month, free. See how much of your evening it gives back.
3. Standardise your answer format
Every additional convention, where the answer goes, how it's written, how units appear, multiplies the cognitive load of marking. The fix is boring but powerful:
- One place for the final answer. A box, a circled number, a margin column. Pick one, stick to it.
- One format for units. Decide in September whether you want
5 cmor5cm, and that's the only way it appears all year. - One method for corrections. A simple "purple pen, dot, correct answer" keeps your red pen marking fast and the child's corrections easy to see.
This also plays well with scanning. A clearly boxed final answer is easier for a machine to read and for you to spot-check on screen.
4. Batch by question, not by pupil
When marking books by hand, the instinct is to do one pupil at a time, cover to cover. That's the slowest possible order, because you're reloading the whole question set into your head on every book.
Instead, fan the books out, and mark Question 1 across all of them, then Question 2 across all of them, and so on. You stay "in" the question, the correct answer stays in your head, and your error-spotting speeds up noticeably by the fifth book.
Bonus: it surfaces class-wide misconceptions in real time. If 18 of 30 pupils got Q4 wrong the same way, you know before you've turned a single page what tomorrow's starter is.
5. Replace written comments with codes
Most schools have moved away from long written comments, but some versions of "formative feedback" still require sentences in books. The middle ground that keeps the formative spirit without the workload is a small, shared code system. For example:
CM— careful mistake (right method, wrong arithmetic).M?— method unclear, show working next time.→— try again, I've corrected the first step for you.★— stretch question for tomorrow.
Codes are instant to write, instant to read, and — crucially — they travel: a TA, a supply teacher or a parent can all interpret them the same way.
Three to five codes is the sweet spot. Past that, children (and you) stop remembering what they mean, and they become just as slow as sentences.
6. Make "next step" the feedback
The research on feedback is consistent: children respond to what they do next, not to praise for what they've already done. If your marking ends at "well done" you've spent time writing something with almost no learning effect.
A one-sentence version that works: highlight one question, and write the next question the child should try. Done. If the marking tool you use can generate targeted follow-up questions from the errors it found, the time cost of this drops to zero.
7. Stop marking what doesn't change practice
Last, and hardest culturally: be honest about which marks you collect that never change anything you do.
- Starters and fluency drills often don't need individual marking at all — a self-mark against answers on the board is fine, and the data you care about (who's fluent, who's not) is already visible in lesson.
- Low-stakes independent practice can be scanned and summarised rather than marked question-by-question. You look at the class picture and the flagged pupils, not every tick.
- End-of-unit assessments are where the detailed per-question attention should go, because the data here genuinely drives next unit's plan.
The point isn't to mark less because you care less. It's to spend the professional judgement on the pieces where it changes what you do.
Key takeaways
- Most "marking time" is admin, not marking. Cut the admin first.
- Mark in-lesson where you can; scan the rest; save your attention for end-of-unit work.
- Consistent conventions, not longer comments, are what actually move children's learning.
Putting it together
In schools that have layered these together — in-lesson marking for fluency work, scanning for drill and booklets, detailed handwritten feedback reserved for end-of-unit pieces — the average reported weekly marking time on maths drops from 7–9 hours to 3–4. Same pupils, same coverage, better feedback quality (because the attention is now concentrated where it matters).
You don't have to adopt all seven on Monday. Pick the one that fits the gap in your current week, run it for a fortnight, and see what it changes. The goal isn't to mark faster. The goal is to have more of yourself left at the end of the day.
