Use an exam error log
An error log should lead to a new attempt. Merely collecting correct answers can create a record of mistakes without changing the next practice session.
By Zehano · Original AI-assisted explanation and worked example · Updated 16 October 2026 · Editorial approach
A worked example
Suppose you answered 2/7 + 3/7 as 5/14. Record the original answer, then explain why the denominator stays seven when the equal-sized parts are combined. Choose a fresh question such as 1/9 + 4/9. Attempt it without looking at the correction, and check the explanation as well as the number.
Try it in three steps
- Keep the original question and attempt.
- Explain the error in specific terms.
- Schedule a new related problem.
What to watch for
“Careless mistake” is often too vague to guide practice. Identify whether you misread a sign, forgot a rule, used the wrong method or failed to check units.
Apply it to your own material
Choose one topic from your current course or project. Write down the question you want to answer, make an attempt, and keep a note of how you checked it. Use the example above as a pattern; replace its subject matter and assumptions rather than copying an answer into a different task.
Open Mistake Review Log ↗Background reading
These sources explain the broader learning principles. Zehano’s examples and software are original; they are not endorsed or individually evaluated by the source authors. This guide is not a systematic evidence review.
- Learning Scientists: six strategies for effective learning
- Retrieval Practice: learning by bringing information to mind