A surprising amount of high-quality IGCSE revision material is free if you know where to look. The problem for most students is not scarcity, it is that good resources are scattered across a dozen sites with inconsistent quality. Here is what is actually worth your time in 2026, organised by what each resource is genuinely best at.
For past papers, go straight to a full past paper library rather than piecing together individual PDFs from search results. Cambridge releases official past papers and mark schemes every session, and having them organised by subject, year, and paper variant saves hours compared to hunting through forum links. GenZab hosts 30,000+ past year papers across major boards, all free to browse and download, with no paywall on the papers themselves.
For chapter notes, look for material written specifically against the current syllabus rather than generic textbook summaries. Syllabus-aligned notes tell you exactly what Cambridge expects you to know for each assessment objective, which matters more than broad topic coverage. Free chapter notes that map directly onto the syllabus structure save you from revising content that will never be examined.
For active practice, past papers alone are not enough once you have been through them once or twice, because you start memorising answers rather than solving problems. This is where AI-generated worksheets earn their place: they let you request fresh questions on a specific weak topic, at a specific difficulty, with a full answer key, so you keep testing understanding rather than recall of a specific paper.
For collaborative resources, community-shared worksheet collections are worth a look, since they surface material other students and teachers have already found useful for the exact same syllabus. Filtering by subject and topic beats a generic web search that returns results for the wrong exam board or the wrong year.
The overall approach that works: use past papers to learn the exam style, syllabus-aligned notes to fill specific gaps, and freshly generated practice questions to stress-test topics you are shaky on, all before your final past-paper mocks in the last two weeks. None of this requires a paid subscription to get started.