Required Practicals Are Examined on Paper, Not in a Lab
Every GCSE science student carries out a set of required practicals across the course. They are compulsory, specified by the exam board, and take up a substantial amount of lesson time.
What almost nobody explains to parents is where they are assessed. Not in the laboratory, and not by the teacher watching. In written exams, months later, by someone who wasn't there. Exam boards put the weighting at a minimum of 15 percent of marks.
That single fact changes what revision should look like, and it changes what an online science tutor can usefully do.
What the Questions Actually Ask
A required practical question rarely asks what result the student obtained.
It asks which apparatus was used and why. Which variable was controlled and how. Why a particular step was repeated. What the most significant source of error was and what it would do to the result. How the method could be improved.
These are questions about reasoning, not about dexterity.
A student can perform the experiment perfectly, obtain a beautiful set of results, and still lose most of the marks because the exam tests whether they understood what they were doing, not whether they did it.
Why This Is Good News for Missed Lessons
Illness, school closures, a broken piece of equipment, a lesson that overran: there are many reasons a student ends up not having done one of the practicals.
Parents tend to treat that as unrecoverable. The experiment happened, it is gone, and the child was not there.
In terms of the exam, it is far less final than it feels. What the student missed was the experience of the method, and what they need for the paper is an understanding of it. Those are not the same thing, and you can build the second without the first.
That does not make missing it ideal. Doing something physically helps most people remember it. But a missed practical is a gap to fill, not a mark that has already gone.
What This Means for Tuition Online
Practical content is among the most teachable material in the whole specification over a video call.
A tutor can walk the method step by step, stopping to ask why each stage exists, working through the apparatus list and drilling the evaluation questions that carry the marks. A bench adds nothing to that conversation. What it usually adds is fourteen other students and a bell in nine minutes.
Many parents looking at private tutoring services discount online science help on the assumption that it cannot cover practical work. The assessment says otherwise.
Where the Marks Are Lost
Three patterns account for most of the lost marks on these questions, and they are all learnable.
Vague apparatus language is the first. Writing "a measuring thing" where the mark scheme wants a named instrument.
Confusing the variables is the second. Independent, dependent and control are straightforward once properly separated, but students constantly conflate them under exam pressure.
Evaluation is the third and the most valuable. Identifying the largest source of error, explaining its effect on the result, and proposing a specific improvement is worth real marks and is almost never practiced, because by the time the experiment finishes, the class has usually run out of time.
How to Check Where Your Child Stands
Ask them to describe one practical from memory, without notes.
Not what happened, but what they changed, what they measured, what they held constant and what could have gone wrong. If that comes out clearly, they are in good shape. If it comes out as a story about what the class did that afternoon, they still have work to do.
It is also worth finding out which practicals their specification requires, since the list differs between exam boards and between combined and separate sciences. The school will supply it, and it turns revision from a vague intention into a finite list.
Frequently Asked Questions
Are required practicals assessed separately from the written exams?
No. The assessment happens within the written papers, which is why explaining the method earns the marks.
My child missed a practical. How much does it matter?
Less than it feels. Method, variables, errors and improvements can all be taught after the fact.
Can science practicals really be taught online?
The examinable part can, yes. Apparatus, method, variable control and evaluation are all discussion and reasoning, and they work well one-to-one over a video call.
How do we find out which practicals are required?
Ask the science department for the list attached to your child's specification. It varies by exam board and by whether they are taking combined or separate sciences.
Ask About the Method, Not the Result
The most common revision mistake on this material is treating practicals as something already done and therefore already covered.
They are not covered until the student can explain the reasoning behind each step, because that is what the paper asks for. A result that was written down in a workbook in Year 10 earns nothing.
Ask your child to talk you through one. The answer will tell you quickly whether the practicals are a strength or a to-do list.
