Dawn, Great! Variety alone just makes classes a bit more interesting. With so much media available these days, sometimes it becomes critical to choose the "best" method or resource among many "good" choices. One key to doing this is to look at what is planned for delivery to students from their perspective, given their level of prior learning and current performance. Then we can say, how best can I teach these students, this topic, in this class, at this time (which may be different from past classes). Barry Westling