the only thing you need to do is watch gcsemathstutor on youtube. i did igcse edexcel, an exam board he doesnt cover but still managed to get an 8.(btw i started revising like 1 month prior to the exam, probably at a grade 5 so hes a real life saver)However, you know sometimes even when you have the best teacher but there are odd few topics you still dont understand, after being taught it, to understand them better i would watch corbet maths(another excellent teacher)also just have a pen and a book to do ur working out. Dont bother buying text books or cgp books coz you dont need them.
Question is how to get Level 2 maths qualification in 8 weeks ? Is there any online test you can take any time?