“My Child Understands the Material But Still Loses Marks in IGCSE” — Here's how to get full marks

EXAM TECHNIQUE · FOR PARENTS

If this sentence sounds familiar, you're not imagining it, and it isn't really about how well your child knows the subject.

It's one of the most common notes we write after a session: strong grasp of the concept, needs exam technique. A student can correctly explain how root hair cells work, why aerobic respiration is more efficient than fermentation, or what causes eutrophication in a lake — and still walk away from a graded “Explain” question with half the marks, because a correct idea and a full mark-scoring answer are not automatically the same thing.

Exams grade sentences, not understanding

A IGCSE marking scheme for an “Explain” question is usually built around specific keywords and a specific causal chain — not

how to get full marks in IGCSE

just a correct general idea. “Root hair cells absorb water” demonstrates understanding. “Root hair cells increase surface area, allowing faster absorption of water and mineral ions” is what actually earns full marks, because it names the mechanism (surface area) and the outcome (faster absorption), in the specific language the marker is scanning for.

This gap is invisible in conversation. When you ask your child about a topic at the dinner table, they can explain it fluently — because spoken explanation rewards genuine understanding and nothing else. A written exam answer rewards understanding expressed in a specific, keyword-dense structure under time pressure. Those are different skills, and a student can be strong in one and underdeveloped in the other without anyone noticing until the grade comes back lower than expected.

What actually closes this gap

• Practice writing “Explain” answers as structure-first, content-second: mechanism → result → significance, every time, as a template rather than something improvised per question.

• After every practice question, compare the answer against a real mark scheme — not for whether the idea was right, but for which specific words earned which specific points. This retrains what “done” looks like.

• Treat wrong-but-close answers as the most valuable practice material, not the most discouraging. The gap between “close” and “full marks” is almost always a missing keyword or an unstated mechanism, not a missing understanding — and that's a fast fix once it's named.

This is, in our experience, the single highest-leverage thing a tutor does that's hard to replicate through independent studying: naming the precise, small gap between what a student knows and what a marker is scanning for, question by question, until the habit sticks.

The Class Tutor works one-on-one with students to close exactly these kinds of gaps — the small, fixable habits that quietly cost marks. Get in touch at support@theclasstutor.com to talk about a session.