Good Grades, Empty Knowledge

There is a moment most parents recognise. You ask your child about something they studied last term. Something they revised for, sat an exam on, and did reasonably well in. And they look at you with the particular blankness of someone who has genuinely never heard of it.

This is not a memory problem. It is a design problem.

School is extraordinarily good at one thing: getting knowledge into a child long enough to be retrieved on a specific date, in a specific room, under timed conditions. What happens to that knowledge the week after is not really the system's concern. The exam has been sat. The grade has been issued. Everyone moves on.

The distinction worth understanding is between knowing something and understanding it. Knowing means you can retrieve it. Understanding means you can do something with it. Explain it to someone who has never heard of it. Apply it somewhere it was never explicitly taught. Build on it. The two feel similar from the outside, especially when the grades are good, but they produce very different human beings.

Richard Feynman had a test for this. If you cannot explain something in plain language to someone with no background in it, you do not understand it. You have a working familiarity with the words used to describe it. That is not the same thing.

Try it with your child tonight. Not what did you learn about photosynthesis. Ask them to explain it to you as though you have never heard the word. Ask them why it matters. Ask them what would happen if plants could not do it. The child who understands will find a way through. The child who has been taught to the exam will produce the learned phrases for as long as they hold, and then stop.

The grades will not tell you which one you have. That question will.