Sophomore year I only had AP European History, which I liked a lot, but I'm really slow at reading/understanding history texts (including primary source documents and the textbook). History, actually, is my worst subject, yet my first AP course subject. I'm not really a history person, even though I like the subject.
Junior year, I'm taking AP Physics, AP Calculus, AP Chemistry, and AP Literature. I just got through general Chemistry class in sophomore year, and it was unbearably slow; the whole course covered material I'd independently taught myself in seventh grade. About halfway through the second semester, I requested the textbook my school uses for the AP Chemistry course so I could learn something that year. Unfortunately, I was so absorbed in learning the new material that I neglected my regular coursework and my grade dropped from A to B to C and I almost was unable to enroll in AP Chemistry (D'oh!). But I did a bunch of make-up assignments and got it up to a B. Same thing with Algebra II/Trigonometry.
So, sophomore year was basically a non-year as far as math and science courses (I want to be a physics or mathematics major; number theory is fascinating), but I enjoyed my other classes. This summer I get to take a course in probability and statistics at the local community college, which means that by my senior year, I will have exhausted every mathematics course available and take an elective (piano or drawing). So yeah, I'm getting ready for some intense fun. (It has always been a fantasy of mine to have more than one science class at once.)
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"There are things you need not know of, though you live and die in vain,
There are souls more sick of pleasure than you are sick of pain"
--G. K. Chesterton, The Aristocrat