I am in year 11, and at my school, we were told that try not to use this holiday to play as such. In my opinion, being a nerd I definitely agree, i have 16 exams D: so i know i need to revise loads. And anyways, after the exams, we have two months of no school B) i would definitely use this holiday to do as much revision as possible.
Also, bearing in mind, after the easter holidays, there is only about 3 weeks back at school afterwards, and then straight after is the exams. if you want to do well, your own effort counts aswell.
Good luck 8)