What subjects are you studying and are you intending to take GCSEs or IGCSEs?
Not that many subjects have coursework (officially called non examination assessment - NEA)
No coursework: Maths, English Literature, History, Religious Studies, Psychology, Business Studies, modern languages, Statistics, Sociology, Latin, Law, Classical Civilisation......
Coursework: Music, Art, DT, Food Tech. Best avoided by private candidates, i.e. people who are homeschooled.
English Language - no coursework for the main assessment but has an endorsement for Speaking and Listening. What you get doesn't affect your GCSE grade. You can avoid having to do this by picking IGCSE English Language.
Sciences. There isn't any coursework as such, but the exam centre has to sign to say that you have completed the required practicals. This makes it difficult for private candidates but there is no such requirement for IGCSEs.
Geography - centre has to sign a declaration about fieldwork that is similar to the Science one.
Citizenship - similar sort of declaration required.