blogs

Blogs can be nice to keep your students updated on things. They can subscribe to your blog through an RSS feed (use feedburner to burn your feed), and have it go a reader, an aggregator, or to their iGoogle page.

Blogs  For example, click here to see the blog we use for my AP Calculus class.
 * Nice for discussions on projects or problems
 * Great for daily assignments - students can subscribe to the blog and have daily assignments/updates come straight to them!

Some other blogs I've found to subscribe to: WolframAlpha Blog Republic of Mathematics

Podcasts http://apple1.parklandsd.org/users/henry/