My child studies for hours but still gets low marks - why does this happen?
Almost always because effort and technique are two different things, and only one of them is visible from the outside. A child sitting at a desk for three hours with a textbook open is undeniably putting in time. Whether that time converts into marks depends on how those three hours were spent - and that part, a parent watching from the doorway genuinely cannot see. Re-reading a chapter for the fourth time feels like studying and looks like studying, but it is one of the least effective ways to prepare for an exam that actually exists, which is why a child can do it sincerely, for hours, and still walk into a test unable to retrieve what they supposedly "knew".
This is the trap worth naming before anything else: a technique problem looks identical to a motivation problem from a report card. Both produce the same number. A parent who only sees the number - not the study session, not the exam paper, not the working - cannot tell them apart without looking closer, and reacting as though it is always about effort is where this usually goes wrong.
There are five ordinary reasons a child who is genuinely trying can still score low, none of which require "not trying hard enough": revising with a method that does not build memory (re-reading and highlighting instead of self-testing), never practising in the exam's actual format, misreading what a question is asking despite knowing the content, running out of time on a paper fully within their knowledge, and losing marks to presentation despite a correct underlying answer. Every one of these is fixable, usually faster than a genuine knowledge gap, because the child is not missing understanding - they are missing a skill for showing that understanding under exam conditions.
The rest of this post is built around one practical job: helping you tell an effort problem from a technique problem from an exam-craft problem, with concrete tells for each, so that whatever you do next actually targets the right thing.