School Credits.

[gothika]

I was wondering since everyone in here is scattered all over the world.
I was wondering can you guys take classes that are 1-2 grades ahead of you?
And can you skip a grade?

Example:I take Spanish 2,Geometry,Advance English. Those classes are all one grade ahead of me.
And also are there certain classes you must take? We must take Gym for one year before we graduate high school.