As a senior at Carson High School, Richard Long is taking advanced-placement courses in calculus, literature and government, which means he will likely get college credit for those classes."We can get the same education we would get at college for a fraction of the price," said Long, 17. "Once we get to college, it's going to shorten the amount of time we have to be there and the money we spend."That's one of the main benefits of offering those courses, said Jason Macy, who teaches AP literature and English. "The purpose is to give them an advanced experience so they …