I was looking at this Web site today and came across the following article. In it are links to Education Week's articles about Obama's and McCain's education platforms. The articles are a bit out of date (pre-primary decisions), but give some insight into the candidates' past stance on education. And as the author states, their previous eduction reform efforts may be the best insight into their future endeavors.
So if education is one of your issues, here is their take on Obama and their take on McCain.