I was a pretty apathetic student not just in high school, but school in general. While I usually got mostly A's by just reading over my notes minutes before a test, I was never on the honor roll, ever (I always managed to get one B every year). In elementary school they tried to test me for the gifted program, but because that entailed more homework I intentionally threw the assessments. That's not me trying to make excuses either; the school knew damn well what I did and made me retake the assessments, so I threw them again but that time I actually put down some right answers for believability.
In high school I put more effort into figuring out which assignments I could ignore doing and still pass the class with a "C" than actually doing class work. However, starting in junior year I took my first AP class which was a very rude awakening to what actual academic rigor looked like, and on top of that I got in the habit of sleeping in all of my classes. I nearly failed every class junior year and barely managed to pull off C's in all my classes except physics (got a B). When I took the SAT in the summer I barely remembered any algebra, so I bombed it (550 math, 670 english, don't remember what that other section score was but I think my total was 1770 with a combined score of 6 out of 12 on the essays). The ACT went a little better (27 IIRC). Come senior year I actually started applying myself and managed to graduate with a 3.5, although my antipathy to work was still a running joke among the senior class.
When I got to college though I actually applied myself (for the most part) and ended up with a 3.8 and 39S, so if anyone was curious about how little predictive value your high school performance has for your college performance, there you go.
Same. 
