YouTube videos: FreeScienceLessons
Pros: free, good for basic understanding, good for AQA candidates, includes practicals.
Cons: passive learning, no question practice.
Personalised multiple choice quizzes: Tassomai (pay for monthly subscription).
Pros: active learning, questions tailored for each exam board, easy to do a bit each day.
Cons: expensive, doesn't practise exam technique, 6+ months to complete the course.
Revision guides: CGP
Pros: inexpensive, available for the most popular exam boards, some students like the informal tone, include some practice questions.
Cons: not much detail, layout is too busy for some learners.
Textbooks: depends on exam board.
Pros: tailored for specification, detailed content, include core practicals, most include plenty of practice questions.
Cons: quite expensive, possibly too much detail if short on time.