Stella,
Having students present before you do is a great idea. Like course objectives, a pretest is just a way to get of sense about how much students have already mastered the key concepts. For instance, say there were 10 primary objectives and through pretesting, an instructor learns the students have previously mastered 8 of the 10. That would provide an opportunity to spend more time on the remaining 8 topics (this is just an example for illustration).
Barry Westling
