There aren't classes for it. Each schools are different. Some MAY have classes, but most of us do "revision" in class - incase we have a test coming up in that subject.
Alicee95 answered Sunday April 11 2010, 10:02 am: Revision is when you have exams coming up and you go over stuff you have already learnt, revising it.
It's to try and remind you of stuff so you don't forget for the exam :) [ Alicee95's advice column | Ask Alicee95 A Question ]
Attention: NOTHING on this site may be reproduced in any fashion whatsoever without explicit consent (in writing) of the owner of said material, unless otherwise stated on the page where the content originated. Search engines are free to index and cache our content. Users who post their account names or personal information in their questions have no expectation of privacy beyond that point for anything they disclose. Questions are otherwise considered anonymous to the general public.