GCSE science practicals are not marked while your teenager does them, yet they still decide a real slice of the grade. Pearson Edexcel, for example, states that a minimum of 15% of the total marks must go to questions about practical work. For a home-educated private candidate, that creates two problems. The exam centre has to give the student access to the required practicals before it can sign the paperwork, and a student who has never done them is at a disadvantage in the written papers. This guide explains how the system works, the realistic routes for home educators in England, and how to build practical skills at home whichever route you pick.
Information checked on 14 November 2026 against exam board documents linked below. Board rules change, so confirm the current specification for the year your child will sit the exams.
How practical work fits into a GCSE science grade
The reformed GCSE sciences have no coursework mark for practicals. Instead:
- each exam board lists a set of required or core practicals that every student should carry out;
- the written exams include questions about those practicals and about practical skills in general;
- the head of the exam centre signs a declaration that students have been given the chance to do them.
Pearson’s FAQ on the Practical Science Statement sets out its version: 18 core practicals for Combined Science and eight for each separate science. It adds that failing to submit the statement is treated as malpractice or maladministration by the centre. That is why centres take it seriously, and why some decline private candidates for sciences.
AQA’s Combined Science: Trilogy specification says private candidates “need to find a school or college who will let them carry out the required practicals”, that there are a minimum of 21 for that course, and that “this is likely to incur a cost”. It also warns that students lacking hands-on experience “will be at an immediate disadvantage” in the exams.
The three routes open to home educators
Route 1: GCSE sciences through a centre that runs practical sessions
Some exam centres and tuition providers run practical days or short blocks for private candidates, so students can complete the required list before entries close. This keeps the standard GCSE route open, including Combined Science, which counts as two GCSEs.
Questions to ask a centre before you commit:
- Which exam board and which specification do you enter for science?
- When are the practical sessions, and how many days do they take?
- What is the total price, including practicals, entry and administration?
- What happens if my child is ill on a practical day?
- Do you need my child to have covered any theory first?
Route 2: International GCSEs with an “Alternative to Practical” paper
Cambridge IGCSE sciences offer a choice of practical paper. The Cambridge IGCSE Biology (0610) syllabus for 2026 to 2028 shows that every candidate takes either Paper 5, a 1 hour 15 minute laboratory practical test, or Paper 6, a 1 hour written Alternative to Practical. Both are worth 40 marks and 20% of the qualification. On Paper 6, the syllabus says candidates “will not be required to do experiments as part of this test”. The syllabus also confirms that private candidates can enter.
This is why many home-educated teenagers take IGCSE sciences. It does not remove the need for practical skill: Paper 6 tests the same experimental skills, through planning, reading results, drawing tables and graphs, and evaluating methods. Students who have done real experiments usually find it easier.
Our comparison of IGCSE and GCSE for home-educated children covers the wider differences between the two.
Route 3: Delay science exams
Some families postpone science qualifications until a student can join a college course after 16. Others sit maths and English first and add science later. This suits a teenager whose interests lie elsewhere, but check entry requirements for any college course or apprenticeship they are considering, since some ask for a science grade.
Comparing the routes at a glance
| Route | Practical access needed? | Best for |
|---|---|---|
| GCSE via a practical-running centre | Yes, at the centre | Families near a suitable centre |
| Cambridge IGCSE with Paper 6 | No lab access needed for the paper | Families with no local practical option |
| Delay until college | Handled by the college later | Teens focusing on other subjects first |
Cost is part of the choice. Pearson’s 2026 to 2027 board fees, before any centre charges, are £106.55 for GCSE Combined Science and £138.05 for International GCSE Double Award Science. Centres add their own fees, and practical sessions are usually charged separately.
Building practical skills at your kitchen table
Whichever route you choose, aim for a teenager who can plan a fair test, measure carefully, record results in a table, draw a graph and say what went wrong. Most of this can be practised with household equipment:
| Skill | Home activity |
|---|---|
| Identifying variables | Does sugar dissolve faster in warm or cold water? Name what you change, measure and keep the same. |
| Measuring accurately | Read a measuring jug at eye level; repeat each reading three times. |
| Recording results | Draw a table with units in the column headings, never in the cells. |
| Graphing | Plot cooling of a mug of hot water every two minutes; draw a smooth curve. |
| Evaluating | List two sources of error and one change that would reduce each. |
Forces and motion are easy to explore with a bicycle: gears, friction in the brakes, and the way pedal force reaches the wheel. This plain explanation of how a bicycle transfers power and stays balanced makes a good starting point for a physics investigation in the garden.
For more household experiments, see our guide to science at home without a lab. Keep the hot-liquid and chemical activities supervised and use only household substances with their labels read first.
A two-year timeline (hypothetical example)
Suppose your child is 14 and plans to sit sciences at 16:
- Autumn, Year 1: choose GCSE or IGCSE, and the exam board. Contact two or three centres.
- Through Year 1: cover theory, and do one home practical a fortnight using the skills table above.
- Spring, Year 1: book any practical sessions the centre runs.
- Year 2: practise past Paper 6 or practical-style questions every week.
- Before the entry deadline: confirm entries in writing. Late fees can double the cost.
Our guide to preparing for external exams as a home-educated teenager covers revision and exam-day planning.
Frequently Asked Questions
Can a home-educated child do GCSE science without a lab?
For a standard GCSE, the exam centre must give private candidates access to the required practicals, which usually means attending practical sessions. If that is not possible, Cambridge IGCSE sciences let candidates take a written Alternative to Practical paper instead of a laboratory test, although home practical work still helps with that paper.
How many required practicals are there in GCSE science?
It depends on the board and course. AQA’s Combined Science: Trilogy has a minimum of 21. Pearson Edexcel has 18 core practicals for Combined Science and eight for each separate science. Check the current specification your exam centre uses, because the list can differ between courses.
Are practicals marked separately at GCSE?
No. Students are not assessed while they carry out the practicals. Instead, questions about practical work appear in the written exams. Pearson states that at least 15% of the marks are for questions related to practical work, so practical experience still matters.
Is the IGCSE Alternative to Practical paper easier?
It is not designed to be easier. Cambridge says the Practical Test and Alternative to Practical require the same experimental skills and test the same assessment objective. Paper 6 removes the need for laboratory access, not the need to understand experiments.