If you want to present a lecture without too many words, then your best bet is to prepare a presentation and let your slides talk for themselves. This makes presentations a convenient tool for teaching online courses. There are quite a few Web 2.0 presentation creation tools available, but the best free options to consider are Prezi and SlideShare.
Click through to read more about each technology!
Prezi is a web-based presentation tool that allows you to build presentations that visually map, zoom in, and display relationships (rather than a static slide show). Prezi has been vetted by eLi and the AECs, and is listed on our Free Tech Tools tab at the top of the page.
SlideShare is a free online repository of slide-based presentations. Users can view presentations that other users have uploaded, or upload their own. You can also obtain codes to embed presentations within your Blackboard sites. In Blackboard 9.1, there is a tool that will allow you to easily add SlideShare presentations to your course sites, without having to use embed codes.