An old resource is usable once you know what it was written for and what it leaves out. The fix is an audit: compare each section with the syllabus for your own exam year, and mark it keep, check or skip.
This page gives a five-step audit and a filled example. It supports your study route and the Chemistry learning guide.
What is actually going wrong?
Three risks come with old resources:
- Extra content. The book covers a topic your syllabus does not list, so time goes into something that will not be assessed.
- Missing content. Your syllabus lists a topic the old book never had, so a gap stays hidden.
- Wrong depth. A topic appears in both, but the book goes further or less far than your entry requires, especially if your tier is different from the book’s.
None of these can be seen from the book alone. You only see them when you hold the book beside the syllabus document.
A five-step audit
- Confirm your code and exam year with your school or exam centre. Use the syllabus navigator to record what is confirmed and what is still open.
- Find the resource’s syllabus from its cover, title page or preface. Write the code and year range, or write “unknown”.
- Compare versions. The syllabus version viewer can show verified changes between official profiles, and it warns when a resource may be out of date.
- Audit section by section using a table like the one below.
- Resolve every “check”. Ask a teacher, your exam centre or read the Cambridge document for your year.
Worked example
A student has a Chemistry book with no year on it and wants to revise from it. After step 1 the student’s code is 0620 and the exam year is confirmed. The table is a fictional extract, using placeholder topic names.
| Section in the old book | In my syllabus list? | Depth matches my entry? | Decision |
|---|---|---|---|
| Topic A, particle model | Yes | Looks the same | Keep |
| Topic B, a calculation type | Yes | Book goes further than the syllabus wording | Check with a teacher |
| Topic C, an industrial process | Not found | Not applicable | Skip for now, recheck list |
| Topic D, a newer-looking topic | Yes | Book has no section on it | Find another resource |
The result is a plan, not a verdict on the book. Topic A is revised.
Topic B is marked “check”, so the student does not spend an evening on extra depth. Topic C is parked. Topic D needs a different source.
This example shows the method only. It does not say which real topics are included in your syllabus. Read the syllabus document for that.
The mistake to watch for
Mistaken approach: “The book is for IGCSE Chemistry, so everything in it is in my exam.”
The student trusted the subject name on the cover and never compared the contents with the current syllabus.
The correction is to use the code and exam year, not the subject name. A book can share a subject name with a current qualification and still differ in scope. Keep a short “check” list and clear it before you rely on a section.
Check yourself
1. Your notes say “for examination from” and show a different year range from yours. What do you do first?
Show answer
Treat the notes as unverified for your year. Open the syllabus for your exam year and audit the notes against it, section by section, marking each keep, check or skip.2. A section matches a topic in your syllabus, but the book goes into more detail. Keep, check or skip?
Show answer
Check. The topic is in scope, but the depth may be beyond your entry. Read the syllabus wording for your entry and ask a teacher or your exam centre before you spend time on the extra detail.3. An old past-paper question tests reading a data table and balancing an equation. Is it worth doing?
Show answer
Probably yes, because reading data and balancing are skills that carry across versions. First check that the chemistry in the question is in your current syllabus. Skip or flag anything that is not.What can you do next?
Use the syllabus navigator for your code and year, then audit one chapter today. Try the mole and equation-ratio tutor and equation balance reasoning trainer on the skills that cross versions, and the assessment guide to see how to check your route.
If the audit leaves too many “check” rows, online one-to-one Chemistry tuition lets a teacher go through them with you against your confirmed syllabus.