I wish I had time to do more examples in lecture, too.  I know students find these useful for learning how to do the problems and think about the concepts.   Unfortunately, our time is limited and we move fairly fast through subjects due to the survey nature of the course.  Lecture time is about more than doing problems.   It is a place where I can tell you how I think about the concepts and how they tie in with other things in science and the real world.  I will do some lectures that are intensive on the examples.  In addition, you have problem sets, workshops and office hours where you can work on problems and examples.  In addition, I have placed textbooks at the appropriate level and problem solutions manuals in the Physics and Astronomy library in B&L.  You will get more out of practice problems if you engage and do them rather than me doing them at the board.  No pain, no gain!