Andrew, PPT along with other media (whiteboad, web-links, DVD's) and acitivities such as small group dicussions, share-pair, etc. all work together to make for an interesting and interactive delivery presentation. We need to keep students engaged and to keep the students mind occupied, changing either the activity or modififying the current activity about every 20-30 minutes helps keep students focused. I limit DVD's unless they're very short and specific to my topic, as they tend to present information in a passive way (that allows students to zone out). Barry Westling