Let's say I'm teaching an undergraduate Calculus 1 course using Stewart's Calculus textbook. Should I spend a fair amount of time in lecture doing examples that are taken straight from the textbook chapters?
I have been doing this, because often the examples are quite good. This book is highly polished, and user-tested over many years, and so I'm unlikely to be able to routinely think of better examples to teach the material.
On the other hand, my lectures might then sometimes feel a bit redundant. A student who has already read the relevant textbook sections might think, "I've seen these examples already, so why do I need to be here?"
What is your opinion about this? My current viewpoint is that it is useful to go over textbook examples in class, because I can't assume the students will have read the book in advance. (And some students find it easier to understand things when explained in a lecture than by purely reading.) I'd like to see what other people think about this issue.