Treatment for my swollen ankle?

I badly sprained my ankle on Saturday, like normal it has swollen up very much. I have heard of R.I.C.E. And i am putting ice on in, i am trying to compress it with bandages, and i am elevating it. But here is the problem, i am in high school and i go to school 5 days a week. I am in the middle of exams and can't afford to take a break off school, so i am not being able to rest it. In the morning the swelling of my ankle has gone down quite a bit but as i am going to school every day i am constantly walking on it, so by the time i get home it is as big as before. How can i treat my ankle in this scenario?