Below are a list of tools that I'd recommend to anyone to support teaching and learning.  I don't get any kickbacks, so this is just my opinion.

1. Wikis

• How to Create a Wiki
• For specific tools, scroll down to the section on "Where can I create a wiki for free?"

2. Social Bookmarking

• What is social bookmarking?
• For specific tools, scroll down to the section on "Possible tools"
• My bookmarks can be found at http://www.jumptags.com/msquareg

3. Blogs

• Edublogs at http://edublogs.org/
• Blogger at http://www.blogger.com

4. Images and Photos

• Where to find images?  Try http://www.flickr.com/creativecommons/
• Where to edit or crop photos? Try http://www.picnik.com
• Always cite your sources.  Teach your students to do this, too.
• Learn what Creative Commons licensing is.  Here's a funny video.  Check out the homepage.

5. Google Docs

• Using Google Reader
• Using Google Docs
•  
• Using Google Docs Presentations
• Using Google Docs Spreadsheets
• Creating forms and quizzes with Google Forms