A practice paper is most useful when it changes what you do next. If every wrong answer is followed by another full paper, the same small gaps can keep returning. An error log helps you identify the reason for a mistake, choose a focused task and check whether the skill has improved.
Use the log alongside your school's specification, teacher feedback and appropriate practice questions. It is not a prediction of your final grade. If you need GCSE maths tuition in Smethwick or online, bring the working as well as the score so the tutor can see where the method changed direction.
Keep the log small enough to use
Choose three to five mistakes from a recent task rather than recording every question you have ever missed. Use these headings in a notebook or a simple document:
| Question or skill | What went wrong | Next action | Retest |
|---|---|---|---|
| Equation with brackets | Added before undoing multiplication | Solve three similar equations and check by substitution | Try a new example without notes |
| Percentage reduction | Subtracted 15 rather than 15% | Find 10%, 5%, then compare with a decimal multiplier | Explain both methods |
| Area question | Answer used length units | Revisit what square units represent | Label units on a new problem |
The “next action” must be something you can actually do. “Revise algebra” is too broad. “Solve three equations with brackets and check each answer” gives the session a clear finish.
Separate the cause from the result
A wrong answer may come from a missing concept, a calculation slip, a misread instruction or incomplete working. These need different responses. If you understand the method but copy a number incorrectly, another hour of introductory explanation may not address the problem.
Explain the attempt aloud before looking at the solution. Point to the first step you are uncertain about. Then compare with the worked answer or ask a teacher to help locate the gap. Record what you learned in ordinary language.
Worked example: an equation with brackets
Solve 3(x + 2) = 21. One route is to divide both sides by 3, giving x + 2 = 7, then subtract 2 to get x = 5. Check by substitution: 3(5 + 2) = 21.
An alternative is to expand to 3x + 6 = 21, subtract 6 and divide by 3. If you wrote 3x + 2, the error is in distributing the multiplier across the bracket. Practise that specific step before moving to harder equations.
Now try 4(x + 3) = 28. The answer is x = 4. Cover the answer while working, then check it in the original equation. Getting the new problem right independently is stronger evidence than copying the first solution neatly.
Worked example: a percentage reduction
A £60 item is reduced by 15%. Ten per cent is £6 and five per cent is £3, so the reduction is £9 and the new price is £51. Alternatively, calculate 60 × 0.85 = 51.
If you obtained £45, check whether you subtracted the number 15 instead of 15% of the original price. If you obtained £9, you found the reduction rather than the final price. Those two errors belong in different log entries because the next action differs.
Retest later and mix the questions
After focused practice, return to the skill on another day using a different question. Then mix it with other topics so you must decide which method applies. Being told “these are percentage questions” removes part of the decision you need to make in an assessment.
Use a simple record: independent, needed a prompt, or needs reteaching. Do not turn one correct attempt into a permanent “mastered” label. If the error returns, adjust the practice and ask for help where needed.
Plan the next revision session
Start with one short retest, work on one priority, then finish with a mixed question. Keep the session proportionate to your timetable and follow your teacher's guidance about exam-board materials. The GCSE maths diagnostic provides another starting point if you do not yet have a marked task to review.
Your next step: GCSE maths tuition explains the relevant support. Ask about a lesson when you are ready to discuss your needs.