On paper, AP classes, aka Advanced Placement courses, seem like a great opportunity to help teens get ahead. They get an early taste of college-level curriculum while earning college credit before high school ends, and therefore get advanced placement once actual college rolls around. But one dad argues that in reality, they are a waste of time and money, and suggests a rather brilliant alternative: “If you have a kid in high school, I'm going to tell you right now, do not put your kid in A...