SOL? You want to really test these kids and stress the system - switch to the NY Regents program. Arcane, outmoded, and ultimately useless - basically its like giving a double-final at the end of the year. One for what you learned in class, and one for everything you have learned on that topic your whole life. The only reason I ever did well on them was because a. I could write, and b. I am an avid reader.
Standardized testing is no real indication, and in some cases, more of a detriment to the school system. Then again, yall have this image problem as it is - advertising on tv and radio about how half the state doesn't have a high school diploma. Yeah, thats gonna get businesses to move here.
How about ads offering the GED program, and making it look attractive, like something thats worthwhile?
Too easy I guess.
Sorry, I've got a brain for PR and Advertising. I always get to know my target market, its like a sickness.