I'm an econ major. Half of my classes are really numbers based. In those classes, we learn about a theory, get tested on it, then kinda forget it because it's so theoretical. The other half are just lecture based and actually about real problems and thinking about ways to fix them. Those are the classes I'm actually learning something in.
Barely any books are used in my classes now. Freshmen/soph year, that's all we used.