I have two presentations I've given to other audiences and which I've recently revised. Based on your interests and experience we can pick and choose our way among the various topics. While there are some analogies to printed materials, many of the characteristics like hyperlinking and the speed at which new content can be created offer unlimited possibilities. We need to understand the medium to derive its fullest benefit. We need to voice what is good and bad, what 'works' with kids, what doesn't.
Some textbooks are better than others.
Some textbooks do some things well and others not so well. Just because something is on a web page is no guarantee that it is quality material. On some sites, the Web is little more than a glorified 'page turner'. All we need is a little imagination. This spring I provided some technical assistance to my wife in using the capabilities of the Web to create several web-based lessons.