Spelling City is a place where your students can practice their spelling words through teaching, games, and practice tests.
Here is what ilearntechnology has to say about Spelling City.
An Excellent Example of a Classroom blog This one uses classblogmeister; but tumblr or jottit could also be used for ease of use
If you are still using the bookmarks feature of your web browser, know that there is a better way; this tutorial on using Del.icio.us.com is for you. Manage the many bookmarks you have and also share with colleagues