We didn't have study leave either, which was annoying as I was far less productive at school than I would have been at home, as in some of my lessons, people were noisy and not wanting to study/do well in their exams. Luckily, I had started revising in March/April and so was well prepared anyway. The trick is to revise early and make the most of your time, that way by the time the exams start you don't need study leave anyway. Actually, it was a slight advantage, as not having study leave meant I didn't have to organise transport to and from exams.