combine these points with public high school budget cuts and it just gets worse. i still remember how demotivating it was being handed a heavy chemistry textbook from three decades ago on the first day of my junior year. the first 5 minutes alone flipping through those pages was probably what killed all interest in science for 19/20 in that class...i mean the authors were out of touch with teenagers even back in the 70s. so my biggest problem with textbooks has been their age: that has been the most significant in making a subject seem static and dead.

i've had CS and foreign language profs who used their own course notes updated yearly, and i ended up relying on these more than any prescribed textbook. the freshness made a big difference. the profs were also more invested in the material because they either wrote it themselves, or at least took the time to assemble. as such they were clued in to the contents and focused on them in lecture. a batch of notes also has less perceived authority than a textbook, which i think is a good thing, as it encourages questions and challenges.