The TOEFL mistake bank
The hour after a practice session is worth more than the session. This is the surface that makes that hour easy to take.
PrepScore collects every TOEFL question you answer incorrectly, in practice or in a mock, and schedules it to come back. A question leaves the bank only when you answer it correctly — not when you have looked at it. Answering it right removes it; answering it wrong keeps it queued.
How it works
- A missed question is queued automaticallyFrom practice or from a mock — you never have to flag anything yourself.
- It comes back on a spaced scheduleSpacing matters: re-answering the same question five minutes later tests short-term memory, not learning.
- It leaves only when you answer it correctlyThis is the part most review tools get wrong. Marking a question as "reviewed" proves nothing; answering it correctly proves something.
Why this is the highest-value habit
On a test scored as the average of four sections, your total is set by your weakest work — and your mistake bank is a precise, sorted list of exactly that. Working through it is more efficient than any amount of fresh practice, because every item in it is already proven to be a gap.
- Filter by section to attack the one dragging your average.
- See how many times you have missed each question — repeat offenders are pattern problems, not slips.
- Every redo shows the full explanation again, so you are re-learning rather than re-guessing.
Practise the 2026 format, not the old one
Every task type in the current test, a full explanation on every question, and a band estimate that shows where your next half band comes from.
Frequently asked questions
How does a question leave the TOEFL mistake bank?
By being answered correctly. Viewing the explanation does not clear it — the queue only shrinks when you demonstrate the answer.
Do mock questions go into the mistake bank?
Yes. Everything you miss in a full mock is queued alongside your practice mistakes, so the review after a mock is already assembled.
Is the mistake bank free?
Yes, on both plans. Redoing mistakes counts against the same daily practice allowance on the free plan.
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By PrepScore · Last reviewed · Editorial standards