A great article about how to set up a Facebook account if you are a teacher and have students as friends.
ALSO, a good article looking at how to use Facebook even if your school has policies about friending students.
A good page for ideas
Wordle is a toy for generating "word clouds" from text that you provide. The clouds give greater prominence to words that appear more frequently in the source text. You can tweak your clouds with different fonts, layouts, and color schemes. The images you create with Wordle are yours to use however you like. You can print them out, or save them to the Wordle gallery to share with your friends.
Kidblog.org is designed for elementary and middle school teachers who want to provide each student with their own, unique blog. Kidblog's simple, yet powerful tools allow students to publish posts and participate in discussions within a secure classroom blogging community.Teachers maintain complete control over student blogs.