When I was in college, my teacher always told us to memorize or study a certain chapter to a certain chapter. Sometimes to simplify what is it in our books were just ignored. Most of the times, our teacher always used books to teach us and they could not teach well when they don’t have books with them.
We always referred what was inside the books, but to understand it and make it simple doesn’t seem exist. I seldom experienced teacher who doesn’t rely on books, and I appreciate teacher who applied what was written in the book. Like a personal experience perhaps so the student could understand it so clearly. Because when we put pressure for each student to memorize the content or study the content and not really trying to understand what is it all about, the student could be just well-trained but not well-educated.