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IGCSE Physics, Cambridge 0625, Malaysia

My Child Understands Physics but Still Loses Marks

A parent guide to why an IGCSE Physics student can understand lessons yet underperform in tests, with a practical diagnostic and next steps.

Written by IGCSEPhysics Content Team · Physics subject adviser: K. S. Tan, 15+ years teaching IGCSE Physics · Checked against the Cambridge IGCSE Physics (0625) 2026 to 2028 syllabus
For parentsYear 10Year 11

Understanding in a lesson and producing a markable answer independently are different skills. Diagnose the missing step from the student’s actual work.

A student can follow a classroom explanation, answer questions aloud and still lose marks when working alone. That does not automatically mean the student lacks ability or effort. It usually means one step between understanding and examination performance is unreliable.

Recognition is not the same as retrieval

An explanation can feel clear while the teacher, tutor or notes are present. In a test, the student must recognise the topic, retrieve the relevant principle and decide how it applies without those prompts.

A useful check is to ask the student to explain the idea from a blank page and then use it in a question with different wording. If the explanation disappears without the original example, the knowledge is not yet independent.

The lost mark may sit outside the Physics concept

Review the marked paper and classify each lost mark:

  • Question reading: a value, condition or command word was missed.
  • Equation selection: the student knew several formulae but chose the wrong relationship.
  • Mathematics: rearrangement, standard form, ratios or arithmetic failed.
  • Units: a conversion was omitted or the final unit was missing.
  • Answer visibility: the student understood the idea but did not write every required link.
  • Graph or diagram technique: the concept was secure but the construction was inaccurate.
  • Timing: later questions were rushed or left blank.

This classification is more actionable than writing “careless” beside the total mark.

Ask what the examiner could actually see

Parents often hear, “I knew that.” The useful follow-up is, “Where can the examiner see it in your answer?” A mark cannot be awarded for a step that remained in the student’s head.

For a calculation, look for the equation, conversion, substitution, working and unit. For an explanation, underline each separate cause-and-effect statement. For a graph, check axes, units, scale, points, line and any requested gradient.

Avoid turning a disappointing mark into an identity

Statements such as “you are careless” or “you are not a Physics person” make the problem sound permanent. Use evidence instead:

  • “Three answers used centimetres where metres were needed.”
  • “The explanation stopped before connecting force to acceleration.”
  • “The last page was unfinished.”

A specific pattern can be practised. A label cannot.

What should happen next?

Choose one repeated error and repair it deliberately. Relearn the rule if needed, complete a small set of questions, mark the evidence and retry the same skill later without notes. Then return to mixed or timed work to check whether the correction transfers.

Do not respond by adding more complete papers when the same error is still uncorrected. Equally, do not stay on notes once the student needs independent application.

When might one-to-one tuition help?

Tuition may be useful when the student cannot identify the cause of lost marks, repeats the same error after correction or needs live feedback on working. Bring the marked paper to the paid trial and ask the tutor to teach from it.

The family should judge whether the tutor notices the student’s method, gives a precise correction and checks a second attempt. A trial cannot guarantee a grade or diagnose the whole syllabus in one hour, but it can show whether the teaching approach fits the problem.

Frequently Asked Questions

Why can a student explain Physics at home but score poorly?
The student may recognise an explanation when prompted but struggle to retrieve it, select the right equation, show the method, answer the command word or manage time independently.
Is this simply carelessness?
Sometimes a slip is involved, but “careless” is too broad to guide improvement. Record the exact failure, such as a unit conversion, omitted link, wrong graph scale or misread command word.
What should a parent bring to a tutor?
Bring one recent test or mock, the question paper if available, the student’s working and any teacher comments. That is more useful than a general description of the problem.
How should progress be measured?
Compare similar marked work and look for fewer repeated errors, clearer working and stronger independent correction. Do not rely on one unusually easy or difficult paper.

Next useful steps

Need Help Applying This?

A 0625 specialist can work through the student's current paper or question and help identify whether the main difficulty is content, mathematics, practical reasoning or exam technique.