So, I took AP Music Theory this year in high school, and it's basically a condensed version of the first year of music theory in college (the Tonal Harmony era -- basically, pre-20th century music). It has all of the limitations of pre-20th century works: Circle of Fifths progression, no parallel/direct 5ths or 8ves, movement is usually stepwise with exceptions, one focal point per period, etc.
This work is my final assignment for that class: a flute solo with a piano accompaniment. It's short but sweet and I enjoyed the two weeks of work it ended up being.
Reviews are appreciated. I might edit this later and tell you all what I got on the assignment.