The most instructive part, however, is when my students struggle with a philosophical idea. It is a big change for a student to go from being asked “how do we solve for ‘x’?” to just plain “how do we solve?” There is nothing concrete for their minds to chew on. It requires aiming their thinking at nothing in particular. This is the single most difficult jump for students. Their minds are strung out on a diet of television, music and standardized exams. They are used to having an easy answer expressible in a simple image, whether their favorite pop star or a choice on a test.