GoogleSites is a great way of enriching your teaching activities with online, rich-media content.
The embedding function is great to add content from other websites into your GoogleSIte syllabus.
Only problem I got was that not all <iframe> embed codes are accepted, and thus not all the embedded content is showing up correctly.
- For example embedding PPT's or PDF's is extremely useful, via http://slideshare.net
Grab the Embed code, copy it, and paste into your GoogleSite in HTML mode!
Now the only tweak you have to do is type an 's' after the source of <iframe> tag, so that it becomes a secure https:// connection.
Otherwise your GoogleSite won't show the pdf or ppt.