As American education has become more mass-market and managed like businesses, I think what is being taught is more watered down in terms of knowledge. I once was hanging out with a few professors and one remarked "if my current students had to take the same exams I took as an undergrad, they would all fail." Just for fun, I'd recommend to dig int some academic archives, and read the exams and quizes for college courses from decades ago, then compare them to what you've taken in college courses in this decade. The difference in difficulty rather leaps out. Idiocracy really is happening.