Core and Extended are route names used by some Cambridge IGCSE subjects, not by all of them. Before you plan revision around a route, confirm that your own subject code uses that structure and which route your exam centre will enter you for.
This page tells you who is responsible for each part, what to read on the Cambridge site and what to ask at school. Use it with the exam guidance section and the syllabus and exam-year navigator.
Who is responsible for the route?
Cambridge sets the structure of each syllabus. That includes whether a subject has routes, what each route covers and any rule about the grades available. The syllabus for your code and exam year is the source to trust.
Your exam centre, usually your school, makes the entry. It records your subject, code and route with Cambridge. If you are a private candidate, the independent centre you register with does this instead.
We do not handle entry. Once you know your route, we can help you with the content.
What should you check, and where?
- Find your exact subject and code. Mathematics 0580 and International Mathematics 0607 are separate qualifications, so a fact about one does not automatically apply to the other. The finding the correct syllabus guide shows how to do this.
- Open the Cambridge subject page from the subject catalogue and choose your exam year.
- Read the assessment overview in the syllabus. Look for words such as Core, Extended, tier or component options. If those words do not appear, your subject may use a single route.
- Note what the syllabus says about grades. If a route limits the highest grade, it will be stated there, not on a forum or in a group chat.
- Check the syllabus changes page for notices that affect your exam year: Cambridge syllabus changes.
What should you ask your exam centre?
Write your questions down first. Short, specific questions get clearer answers.
- Which route or component options will you enter me for in my subject?
- When is that decision recorded, and can it be reviewed before entry is made?
- Who should I speak to if I think a different route suits me better?
- Where will I see the route written, for example on my statement of entry?
The statement of entry checklist explains what to look for once your entry is confirmed.
A worked example of checking
Suppose a student says, “I am preparing for Extended Mathematics.” A careful check looks like this.
- Confirm the code. Is it 0580 or a different mathematics code?
- Open that code’s Cambridge page and read the assessment section for the exam year.
- Compare the topic list for the route with the student’s notes.
- Ask the school which route appears on the entry.
If any step gives a surprise, the student asks the centre before changing the revision plan.
A common mistake
Students often copy a route choice from a friend who studies a different subject, or from last year’s advice. A route in one subject says nothing about another, and a syllabus can change between exam years.
The fix is simple. Use the Cambridge page for your code and year as the source, and ask the school to confirm your entry.
How does a teacher help once you know the route?
Knowing the route tells you what the syllabus expects. A teacher can then look at your actual answers and show you which expected skills are secure and which are not. This is separate from the entry decision, which stays with your centre.
To have a teacher do this for your subject, see how our tuition works and the subject tuition pages. Then message us on WhatsApp for a paid one-hour trial with an assigned teacher.