How to revise for GCSE Physics without just memorising
GCSE Physics rewards a slightly different kind of revision from maths. There's content to learn, yes, but most of the marks come from understanding what's going on and being able to apply it, plus a fair bit of maths that quietly catches students out. Here's how to help your child revise it properly rather than just learning facts by heart.
In this guide
Understanding beats memorising (but learn the equations)
The students who do best in GCSE Physics are the ones who understand what's actually happening, not the ones who've memorised the most definitions. Exam questions love to take a familiar idea and put it in an unfamiliar situation, and rote-learned facts fall apart the moment the context changes. If your child can explain why something happens, they can handle the question whatever shape it takes.
That said, physics isn't all understanding. There are key definitions and equations your child simply has to know cold. The trick is to balance the two: understand the why, and memorise the handful of essentials that the exam assumes you can recall instantly.
Nail the required practicals
Every exam board tests the required practicals, and they come up year after year, so they're some of the most predictable marks on the paper. Yet they're often the bit students revise least, because they're easy to forget once the experiment is over.
Make sure your child can talk through each required practical: the method, the variables, what the results should show, what could go wrong, and how they'd improve it. Knowing these properly is one of the most reliable ways to pick up marks, because the questions are so repetitive once you've seen a few.
Don't drop the easy maths marks
A surprising amount of GCSE Physics is really maths: rearranging equations, working with units, standard form, significant figures, and reading values off graphs. These are gettable marks, and students lose them constantly, usually because their underlying maths is a bit shaky rather than because they don't understand the physics.
Tightening this up is one of the quickest wins available. The same algebra fluency that helps in maths pays off directly here, so it's well worth practising rearranging and substituting into equations until it's automatic. My guide on how to revise for GCSE Maths covers how to drill exactly that.
Past papers and the long questions
As with every subject, past papers under timed conditions, marked against the official mark scheme, are the backbone of good revision. Physics has one feature worth singling out: the long extended-response questions, usually worth six marks, which trip up students who write everything they know and hope for the best.
A trick I use with my students: on the six-mark questions, examiners are ticking off specific points, not marking an essay. Before writing, jot down the points you want to make and the key terms you need to use. It stops the rambling, makes the answer logical, and means you actually hit the things the mark scheme is looking for.
Equations: given or memorised?
Some physics equations are provided in the exam, and some your child is expected to have memorised. Which is which depends on the exam board, so the first job is to check their specification and find out exactly what they need to know by heart.
Then make a list of the must-memorise equations and drill them like flashcards, including what each symbol means and the units. Walking into the exam certain of those is one less thing to worry about, and it frees up thinking for the parts that need it.
How you can help as a parent
As with maths, you don't need to understand the physics yourself to be genuinely useful. The structure around the revision is where you make the difference.
- Quiz your child on equations and definitions from a list. You only need to read the answer off the card, not understand it.
- Help set up a regular, quiet revision slot so it happens by routine rather than by nagging.
- Watch for the maths creeping in. If your child keeps slipping on the calculation questions, that's often a maths gap worth tackling head on.
- Encourage the effort and keep it calm. Confidence matters in physics as much as in any subject.
And if there are topics that just won't stick, whether that's the practicals, the maths, or a concept that refuses to click, that's exactly where a few focused one-to-one sessions tend to make the biggest difference.