I think it depends what book you're looking at. Pedagogy in education is a pretty recent thing IMO.
As of the teaching side, I went through my entire math bachelor without understanding what were the applications of what I was learning. Now that I do cryptography I finally understand some of these. There was also this course by Gilbert Strang on matrices that taught me that they were used in compression. None of my teachers could have told me that...
As of the teaching side, I went through my entire math bachelor without understanding what were the applications of what I was learning. Now that I do cryptography I finally understand some of these. There was also this course by Gilbert Strang on matrices that taught me that they were used in compression. None of my teachers could have told me that...