How to Analyse Mistakes After 11+ Practice

To analyse 11+ mistakes, look past the mark and work out what happened between reading the question and giving the answer. Classify each useful error by its observable cause, choose one small next action, then check that action on a fresh question. The aim is not to create a larger error log. It is to make the next practice session more precise.

This guide focuses on the review that happens after English or Maths practice. You are examining one response closely enough to decide what to do next, rather than exploring the wider theory of misconceptions or proofreading a piece of writing.

Contents

What analysing a mistake means

Six useful error classes

A practical review routine

English example 1: inference and evidence

English example 2: vocabulary in context

Maths example 1: a fraction of an amount

Maths example 2: perimeter

Turn the pattern into the next task

A parent action sequence

Common mistakes

Adjustment cues

Frequently asked questions

Next step

Sources

What analysing a mistake means

Marking answers tells you which responses match the key. Analysis asks a different set of questions:

What did the question require?

What did your child actually do?

At which step did the response move away from a sound route?

What is the smallest useful next action?

Can your child apply that action to a fresh example?

The answer key is a starting point, not an explanation. A wrong answer might come from missing knowledge, a misread instruction, an unsuitable method or a small execution slip. A correct guess can deserve attention too.

The Education Endowment Foundation’s guidance concerns teacher-delivered feedback for pupils aged 5 to 18 across subjects, rather than a tested parent routine for 11+ work. It recommends first eliciting evidence of learning so that a specific gap can be identified, focusing feedback on the task, subject or self-regulation, and giving pupils an opportunity to use it.[1] The routine below is a practical home application of those broad principles, not a promise of a particular result.

Six useful error classes

Use plain labels that point towards an action. You do not need to force every answer into a box; write unclear if the working does not show enough.

| Error class | What you can observe | Useful next action | | --- | --- | --- | | Task reading | A condition, unit, instruction or requested answer was missed | Restate what the answer must contain; try a parallel instruction | | Knowledge or meaning | A word, fact, notation or concept is not understood | Teach or revisit that item before more mixed practice | | Method selection | The child knows relevant steps but chooses a route that does not fit the question | Compare two question types and identify the deciding clue | | Execution | The route is sound, but calculation, copying or ordering goes wrong | Correct the exact step and use a short checking cue | | Evidence or explanation | The conclusion may be plausible, but the response does not prove or explain it | Select the strongest supporting detail and connect it to the answer | | Completion or confidence | The item is blank, rushed, guessed or correct but uncertain | Ask how the child started, then adjust length, support or practice format |

These describe the work, not the child. Say, “This answer missed the second condition,” rather than, “You are careless.” If more than one class seems possible, record the first useful point or write unclear.

A practical review routine

1. Reconstruct the response

Keep the original working visible. Ask what the question meant and why your child chose that route before you explain the answer.

Try: “What was the question asking?”, “Which clue did you use?”, “Where did you become unsure?” and “Were you sure, choosing between two answers or guessing?”

2. Find the first useful divergence

Compare the response with a sound route and find the first place they differ. Later errors may simply follow from there. Dividing 48 by 4 correctly but stopping before multiplying by 3 is not a division gap; a plausible inference unsupported by the passage points to evidence selection.

3. Classify cautiously

Use the child’s words and written steps. A blank could mean unfamiliar content, uncertainty about the instruction or that time ran out, so test possibilities rather than guessing.

4. Choose one next action

Match it to one move: teach missing knowledge, contrast methods, practise an understood but unreliable step, or check a small execution or reading slip.

5. Use a fresh check

Change the wording, values or context while keeping the same demand. The answer should require reasoning, not memory of the correction.

English example 1: inference and evidence

Read this original passage:

> At the first clap of thunder, Nia folded the map, tucked it inside her jacket and hurried towards the shelter. She kept one hand over the zip until she was under the roof.

Question: Why did Nia put the map inside her jacket? Use evidence from the passage.

A child answers:

> She was frightened of the thunder.

That is possible, but it does not explain why the map went inside the jacket. Nia tucks it away, covers the zip and hurries to shelter: together, these details support the inference that she wants to protect it from the approaching rain or storm.

Classify this as evidence or explanation: the child formed a plausible idea but did not connect it to the object and actions in the text. Try this next:

underline the noun named in the question: map;

circle two actions involving it;

complete: “Nia protected the map because ___, shown by ___.”

A checked answer is: “Nia wanted to keep the map dry because she put it inside her jacket and covered the zip while hurrying to shelter.” Require the reasoning, not those exact words.

For more examples at this level, see the English Mastery lesson example.

English example 2: vocabulary in context

Consider the sentence:

> Arun reluctantly handed the final slice to his brother, pausing before he let go of the plate.

Question: What does reluctantly mean here?

Suppose the child chooses quickly. Ask which details support that choice. “Pausing” and taking time to let go point in the opposite direction. Here, reluctantly means unwillingly or with hesitation.

This is a knowledge or meaning gap if the word is unfamiliar, but an evidence gap if the child knows it and ignored the clue. Test with a new sentence:

> Leila reluctantly left the warm room to fetch her bag from the cold car.

If the child explains that Leila does not want to go, practise using context. If not, teach the word and contrast it with eagerly.

Maths example 1: a fraction of an amount

Question: What is 3/4 of 48?

A child writes:

> 48 ÷ 4 = 12, so the answer is 12.

The first step is correct: one quarter of 48 is 12. The response stops before finding three quarters. A complete route is:

48 ÷ 4 = 12 finds one quarter;

12 × 3 = 36 finds three quarters;

check that 36 is three groups of 12 and is less than 48.

Classify this as method execution or completion: the denominator step is sound, but the numerator step is missing.

Use a fresh check: What is 2/5 of 35? One fifth is 35 ÷ 5 = 7, so two fifths are 7 × 2 = 14. Ask the child to say what each number represents rather than merely copy the pattern.

Maths example 2: perimeter

Question: A rectangle is 8.5 cm long and 4 cm wide. What is its perimeter?

A child writes:

> 8.5 + 4 = 12.5 cm

The addition is accurate, but it includes only one length and one width. A rectangle has two of each:

> 8.5 + 4 + 8.5 + 4 = 25 cm

or

> 2 × (8.5 + 4) = 2 × 12.5 = 25 cm

The likely class is method selection or task meaning: the child has found the sum of adjacent sides rather than the distance all the way around. Ask them to trace all four sides on a sketch before calculating.

A fresh check is a rectangle measuring 7 cm by 3.5 cm. Its perimeter is 2 × (7 + 3.5) = 21 cm. Ask why all four sides are included. The Maths lesson example offers further step-by-step reasoning.

Turn the pattern into the next task

Look for a repeated, actionable pattern. Three lost marks might come from one missed instruction; one answer might reveal a prerequisite that needs teaching.

Keep a short record:

| Item | First useful divergence | Class | Next action | Fresh check | | --- | --- | --- | --- | --- | | Reading 6 | Answer explains thunder, not the map | Evidence | Link the named object to two actions | New inference passage | | Maths 11 | Stops after finding one quarter | Completion | Say denominator step, then numerator step | 2/5 of 35 | | Maths 18 | Counts two rectangle sides | Method | Trace the boundary before calculating | 7 cm by 3.5 cm rectangle |

Place the action into your weekly English and Maths study plan. If the issue is remembering previously taught material, keep that separate and use the retrieval practice guide.

A parent action sequence

Choose a small sample. Review a repeated pattern, a surprising error and perhaps one uncertain correct answer—not every mark at once.

Ask before telling. Let your child reconstruct the question and their route.

Locate the first divergence. Mark the precise word, decision or calculation where the route changed.

Name the class. Use an observable description and write unclear when evidence is thin.

Select one action. Teach, contrast, practise or check.

Try a fresh example. Preserve the underlying demand but change surface details.

Record only what matters. Keep the next one or two priorities, then stop.

Common mistakes

Writing “careless” beside everything

“Careless” does not tell you what to change. Record the event: copied 64 as 46, missed the word not, omitted the unit or counted only two sides.

Assuming every wrong answer is a knowledge gap

Inspect the working first. Reteaching fractions would miss the point if the child correctly found one quarter and simply stopped too soon.

Correcting without hearing the reasoning

A supplied explanation can hide what the child originally understood. Ask for their route before showing yours.

Repeating the identical question

The child may remember the corrected answer. Change numbers or wording so that the same reasoning has to be used again.

Analysing only wrong answers

Review correct guesses and low-confidence responses, but do not turn every secure answer into an interview.

Adjustment cues

Teach before more classification when:

your child cannot explain the key word, notation or underlying idea;

several answers depend on the same missing prerequisite;

the task contains content that has not yet been taught.

Use a smaller review when:

discussion becomes defensive or tiring;

several causes are being assigned to every item;

the error log is growing faster than actions are completed.

Move on when:

your child explains the corrected reasoning in their own words;

they solve a fresh example without copying the original route blindly;

the next practice no longer shows that pattern.

Frequently asked questions

Should we analyse every mistake?

No. Choose mistakes that are repeated, surprising or useful for the next teaching decision. A small sample reviewed well is more manageable than a commentary on every mark.

What if I cannot tell why the answer went wrong?

Write unclear. Ask your child to solve one similar item while explaining each step. If the cause is still uncertain, return to a simpler example rather than guessing.

What should I do with a correct guess?

Treat it as uncertain. Ask for an explanation and use one fresh item. If the reasoning is secure, move on; if not, teach or practise the missing step.

How many error classes should we use?

Use only enough to guide action. The six classes in this guide are a practical starting point, not a fixed assessment system.

When should we revisit the error?

After the correction, use a fresh check in the current or a later short session. The approved guidance does not prescribe one universal timing rule; choose a point when your child can genuinely use the feedback.[1]

Next step

Choose three responses from the latest English or Maths practice: one repeated error, one surprising error and one uncertain answer. Reconstruct the reasoning, name the first useful divergence and finish with one fresh check for each priority. When you want worked material for that follow-up, Explore English and Maths lessons.

Sources

[1] https://educationendowmentfoundation.org.uk/education-evidence/guidance-reports/feedback — Education Endowment Foundation, Teacher Feedback to Improve Pupil Learning.