I do OCR and it's a really good board. I would recommend this and this as a textbook as it covers all the content specifically for each unit with a lot of good questions and exam technique in a light-hearted manner so it's 'funner' to learn.
As for exam time so do you mean like when to sit the exams or timings (ie. 5 mins to read the case study...)?
To learn make notes from the book and use tutor2u to reinforce it. You'd be well on your well to a high grade if you did that