IGCSE Core papers cap the maximum grade, while Extended papers allow the full range, so the tier decision matters; tutoring can help a student near the boundary secure the Extended content before the school makes entries. Many Cambridge IGCSE subjects, including Mathematics (0580) and the sciences, are tiered. Parents often find out about the tier decision late. This guide explains how tiers work and how to prepare.

Written by Tutopiya, an online tutoring company. Grade ranges vary by syllabus; check your child’s syllabus and ask the school about its process.

Key takeaways

• Core limits the top grade; Extended allows the full range.
• In Cambridge 0580 Maths, Core is graded C–G and Extended A*–E.
• Schools usually decide tiers in Year 11 based on tests and mocks.
• Strengthening supplementary content before entries can change the decision.

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How do Core and Extended tiers work?

	Core	Extended
Content	Core content	Core plus supplementary content
Maximum grade (0580 Maths)	C	A*
Lowest grade (0580 Maths)	G	E
Papers	Core papers	Extended papers

Grade ranges and papers differ by subject, so check the current syllabus on the Cambridge IGCSE pages. Pearson Edexcel uses Foundation and Higher tiers in some subjects, with similar logic.

Why does the tier matter?

Because Core caps the grade, and many next steps require more than a C. Sixth-form and A Level courses often require a B, A or higher in the subject. For example, A Level Maths usually needs a high IGCSE Maths grade, which only Extended allows.

Next step	Typical requirement
A Level Maths	High Extended grade in Maths
A Level Chemistry or Physics	Extended in the subject and Maths
IB Maths AA HL	Strong Extended Maths
Most sixth-form courses	A minimum number of C grades or above

Check the specific requirements of your child’s sixth form or school.

How do schools decide?

Usually from test and mock results in Year 11, plus teacher judgement. Students consistently near the Extended boundary may be moved up or down. Ask the school when entries are finalised and what evidence they use.

How tutoring can help: step by step

1. Ask the school which tier your child is currently expected to sit and why.
2. Identify the supplementary topics your child finds hardest.
3. Book focused tutoring on those topics and on Extended-style questions.
4. Practise Extended past papers under time.
5. Share improved results with the school before entries close.

Our Cambridge IGCSE mathematics tutors often work with students near the tier boundary.

Which topics separate Core and Extended in Maths?

Area	Extended-only examples
Algebra	Harder factorising, algebraic fractions, functions
Graphs	Gradients of curves, transformations
Geometry	Circle theorems, 3D trigonometry
Statistics and probability	Cumulative frequency, conditional probability

Check the syllabus for the full list of supplementary content.

Is Extended risky?

There is some risk. On Extended papers, students who score below the lowest Extended grade may be ungraded. Schools balance that risk against the higher ceiling. If your child is close to the boundary, discuss the risk with the teacher.

Signs your child could aim for Extended

• consistently strong on Core papers;
• confident with most supplementary topics;
• aiming at A Level or IB courses in the subject;
• improving steadily through Year 10 and Year 11.

How parents can help

• ask about the tier early in Year 11, not after entries close;
• understand the grade requirements for your child’s next step;
• encourage steady practice on supplementary topics;
• keep communication open with the teacher.

How much tutoring is enough?

Around one hour a week in the subject, for a term before entries are finalised, is a common approach for students near the boundary.

Does online tutoring work for this?

Yes. Tutors share Extended past papers on screen and work through supplementary topics on a shared whiteboard, and lessons fit around Year 11 schedules.

How Tutopiya tutoring works

Tutopiya offers one-to-one online IGCSE tutoring.

• A tutor matched to the subject and syllabus.
• A free first trial lesson, with no card needed.
• From 4 hours a month per subject. Each tutor sets their own rate, which you see before booking.
• AI lesson analysis gives a summary, flashcards and quiz questions after each lesson.

See our IGCSE maths tuition page.

Questions to ask the school

1. Which tier is my child expected to sit, and why?
2. When are entries finalised?
3. What would need to change for a move to Extended?

Common mistakes

• Finding out about the tier too late → ask early in Year 11.
• Ignoring next-step requirements → check sixth-form entry rules.
• Revising Core only when aiming for Extended → practise supplementary topics.
• Not sharing progress with the school → show improved results before entries close.

Talk to us

If your child is near the boundary, contact our team. See also our guide to what to do after a bad IGCSE mock and Year 10 IGCSE tutoring.

Summary: Core caps the grade and Extended allows the full range; ask about the tier early, check next-step requirements, and use targeted tutoring on supplementary content before entries close.

Frequently asked questions

What is the difference between IGCSE Core and Extended? +

Core covers the core content and has a lower maximum grade. Extended covers the core plus supplementary content and allows the full grade range. In Cambridge IGCSE Mathematics 0580, Core is graded C to G and Extended A* to E.

Who decides whether my child sits Core or Extended? +

The school decides, usually during Year 11, based on test and mock results. Parents can discuss the decision with teachers, especially if a student is close to the boundary.

Can a student move from Core to Extended? +

Sometimes, if their results improve before entries are made. Ask the school about the deadline and what evidence they need.

Is it risky to sit Extended? +

There is a risk: students who perform poorly on Extended papers may get a lower grade or be ungraded if they fall below the lowest Extended grade. That is why schools enter students carefully.

Can Tutopiya help with the tier decision? +

Tutopiya tutors can help a student strengthen the supplementary content and exam technique before entries are made. The first trial lesson is free with no card required.

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