Google Docs offers an undocumented feature that lets you embed PDF files and PowerPoint presentations in a web page. The files don't have to be uploaded to Google Docs, but they need to be available online.
We will be using this wikispace to collect images or videos, and to discuss the cognitive process shown in the them. Images can be uploaded from your computer easily using the picture uploader tool. If you create an account at youtube you can upload your own videos to youtube and then embed them in the wikispace using the widget tool. Please see the screencast page for directions in case you get stuck.