| redset 
 
 
 Joined: 18 Mar 2006
 Posts: 582
 Location: England
 
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				|  Posted: Thu Sep 24, 2009 1:57 pm    Post subject: |   |  
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				| With prepositions you really have to learn them as you go. It's always in class - you can think of it as inside the classroom, or maybe within a period of time (from the start of the class to the end). 
 If you have a test on something it means on that subject - if you had a test on PE class then you would be answering questions about the class: who the teacher is, what kinds of sports you do, when you have PE each week, things like that. A test in PE class would be about the subject: maybe you'd have to run some laps, or explain the rules of tennis.
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