Frustratingly, these are required now because a significant number of American high school grads didn’t actually absorb any of that information in high school. College professors have long bemoaned the declining educational attainment of incoming students (not surprisingly, starting around when W signed NCLB into law) and these remedial introductory classes are an attempt to bridge the gap between what freshmen are actually bringing in to college and where they need to be to actually grasp more advanced concepts.