Dude, I only had a 580 on my verbal, and I did extremely well in high school.
Hell, one of our class valedictorians barely broke 1000 on his SAT. Another kid who failed senior year broke 1300. Standardized tests are teh gay.
Yeah I graduated middle of my class. I needed the high SAT score to get into a good college after screwing around academically 
As far as what I was good at, just math. I got really lucky on my verbal actually. But it's true, I don't read things as carefully as I should, and it definitely cost me on my verbal sat. Hell, it probably cost me from a perfect math sat. I got a 5 on my BC Calc exam, if I remember correctly math only went up to some geometry. No excuse for missing any of those questions.
But, now I'm a lot like Toxic Adam. I realize how pedestrian any of my accomplishments really are. I'm not good at anything, but I'm a decent multitasker. And I'm better at a lot of things than most, but I hardly excel at anything. Most people don't.
You're right about it only going up to geometry and algebra II, I THINK. I remember taking exams that went up to higher level trig but I think those were the PSSAs, the Pennsylvania State Standardized Assessments or something. They're a product of NO CHILD LEFT BEHIND OMG.
I'm kind of in the same boat now. I had exceptional grades in high school and I was involved in
everything. That was the only thing I could be proud of because it was the only way I could distinguish myself.
Know how you get varisty sports letters? We had academic and leadership ones as well. The leadership one was like, you got x points for each year you were a club member. You got x points for each year as an officer. x points for editorial board of one of the publications. x points for being in the band. Stuff like that. Well, we got the leadership letters on Class Day, which is right before graduation. My friend Andrew and I had the most points by a shit ton above the other students, enough for like 7 letters between us or something lol, and the dean recognized both of us for it.
I wasn't a valedictorian or a state athlete or the prom queen or anything like that, so that was probably my biggest accomplishment. It's pedestrian now, like you said. I'm not really that exceptionally good at anything. It's kind of sad, really.
[Sorry about the nostalgic emo-ness. I still heart you guys.]