Ds and I worked out on Monday that if he revises for 2 hours on three evenings a week and does 8 hours over the weekend, plus 5 hours a day on study leave days, he will have about 50 hours revision time before exams start.
Over four subjects that's just over 12 hours each. Some subjects are split into two sections (such as history which is Romans with one teacher and Greeks with another) so in effect that's just 6 hours for each section.
He is going to try and just do practice papers to get his essays sorted and then do a few timed ones without notes to see how he gets on. I'm surprised but obviously pleased that he seems to have a plan. He's even started looking at university courses at last!
Study leave start Monday. Good luck to everyone 