GCSE maths revision that helps your child get unstuck

When your child gets stuck on a GCSE maths question, Kodori helps them understand the missing step before they try again.
Online GCSE maths tutoring for children aged 14 to 16. Guided help for Foundation and Higher topics currently available in Kodori in Years 10 and 11. Written to the AQA, Edexcel and OCR curriculum, at Foundation and Higher level.
A difficult GCSE maths question can reveal an earlier gap. Kodori helps your child return to the idea behind the question, understand it clearly, then try a similar question for themselves.

£24.99 per child each month after a 7-day free trial.

For children in Years 10 and 11GCSE maths · ages 14 to 16 · Foundation and Higher

Part of Kodori GCSE tutoring. Maths, English and science are included on the same plan.

One month of Kodori costs less than one hour with a private tutor.

Explore Kodori tutoring

Choose maths, English, science, SATs or GCSE support.

A wrong answer can look careless. Often, there is a missing idea underneath it.

A coat costs £60 in a sale after 20% off. What was the original price?
What your child wrote

Add the 20 per cent back on.

60 × 1.2 = £72
Not correct yet
Adding 20% to £60 feels like a sensible first step. But £60 is already the sale price. After 20% off, it represents 80% of the original price.A mark tells your child that the answer is wrong. A clear explanation helps them see why, so they can use the method on the next GCSE maths question.
What Kodori does

First, work out what the percentage refers to.

The difficult part is not the calculation. It is knowing which number represents the whole amount. Once your child understands that £60 is 80% of the original price, the calculation makes more sense.
1
Identify £60 as the sale price
2
Recognise that 20% off means 80% is left
3
Write: 0.8 × original price = £60
4
Find the original price, then try a similar question independently

This is the difference between a mark and an explanation.

Giving your child £75 gives them an answer. Helping them see that £60 represents 80% gives them a method they can use again in reverse percentage questions.

GCSE maths topics your child can get help with, at Foundation and Higher.

GCSE maths tutoring for Years 10 and 11. Kodori supports Foundation and Higher topics currently available in the product.
GCSE maths area
Examples of topics
Number
Fractions, decimals, percentages, standard form, indices and bounds
Algebra
Expressions, equations, graphs, sequences and quadratics
Ratio, proportion and rates of change
Ratio, percentages, direct and inverse proportion, compound measures
Geometry and measures
Area, volume, Pythagoras, trigonometry, transformations and vectors
Probability and Statistics

Tree diagrams, relative frequency, averages from tables, scatter graphs, cumulative frequency

Covering the GCSE maths topics currently available in Kodori, aligned to the AQA, Edexcel and OCR curriculum, at Foundation and Higher level.

AQA, Edexcel and OCR GCSE maths.

GCSE maths has common subject content in England, but AQA, Pearson Edexcel and OCR each publish their own specification and exam papers.
Kodori focuses on the mathematical idea behind the question. Your child does not need to choose an exam board before getting help with an available topic.For final exam preparation, use your school’s current specification and official past papers alongside Kodori.

GCSE maths often depends on earlier maths.

Kodori covers children aged 7 to 16, in Years 3 to 11, across KS2, KS3 and GCSE. That matters more at GCSE than anywhere else.

A difficult GCSE question can rely on an idea first taught years earlier. For example, a child struggling to rearrange an equation may need to revisit inverse operations before the GCSE method makes sense.Kodori can use a simpler example to rebuild that idea, then return to the GCSE maths question.
School stage
Year groups
What Kodori covers
KS2
Years 3 to 6
Maths, English and science for primary, plus available Year 6 KS2 SATs support
KS3
Years 7 to 9
The maths, English and science tutoring for key secondary school topics
GCSE
Years 10 and 11

GCSE tutoring support for available topics and question types in maths, English, Biology, Chemistry and Physics.

Where to go nextSee the GCSE hub for English and science, or maths tutoring across KS2, KS3 and KS4. Get help with homework the school set, or read is AI tutoring safe.

One month of Kodori costs less than one hour with a private tutor.

Primary and KS2
£24.99 per child, per month
Secondary and GCSE
£24.99 per child, per month
Maths, English and science are included on the relevant plan. Start with a seven-day free trial and cancel any time. See the pricing page for full details.
A typical private tutor session
Kodori
A booked session at a set time
Guided tutoring whenever your child uses Kodori
Usually focused on one subject
Maths, English and science
Paid lesson by lesson
GCSE plan: £24.99 per child, per month
Compared with a typical one-hour private tuition session. Tutor rates vary by subject, location and experience.
Kodori is an AI tutor, not a live one-to-one human tutoring service. It gives guided support when your child is working through a difficult question.

Questions parents ask about GCSE maths revision.

More questions are answered on the Kodori FAQ page.
Does Kodori cover AQA, Edexcel and OCR GCSE maths?

Yes. All three boards teach the same GCSE maths subject content, set by the Department for Education, so Kodori’s GCSE maths is written to that content and works whichever board your child’s school uses.

What differs between boards is how they assess it: paper structure, how marks are weighted, and some optional content. Kodori teaches and practises the maths itself.

Kodori supports Foundation and Higher GCSE maths topics currently available in the product. If you are unsure which tier your child is taking, their school can confirm it.

No. Kodori is designed to guide your child through a difficult question, not complete the work for them. It gives questions, hints and explanations so your child can understand the method and have another go.

Yes. Your child can ask for the idea to be explained in a different way, use a simpler example and then try a similar GCSE maths question. This can help them reconnect the lesson with their homework or revision.

Children aged 7 to 16, in Years 3 to 11, covering KS2, KS3 and GCSE in maths, English and science. GCSE maths is Years 10 and 11, ages 14 to 16.
Secondary and GCSE plans are £24.99 per child each month, and maths, English and science are all included. Start with a seven-day free trial and cancel any time.

See how a GCSE maths mistake becomes a clear explanation.

Start your 7-day free trial and try Kodori with a real GCSE maths question. Cancel any time.
Kodori is an AI tutor for children aged 7 to 16, in Years 3 to 11, covering KS2, KS3 and GCSE. It offers tutoring in maths, English and science, including available GCSE maths support for Years 10 and 11.
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