I took advanced comp (the non-traditional high school version of AP) and while it was a college-level course, I still had an A+ average in the class.
Be ready for a lot of analytical reading, and be ready to think outside the box. Also, you'll have to seriously tighten the organization of any writing you do, and pay extra attention to grammar and flow and all that.
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There's being unique and different, and then there's being too different. I don't seem to toe that line well at all.
I love PMs but have no clue how to start a conversation.