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Joey Green's Mad Scientist Experiments - let's blow up something, kids! :)

Learn American Sign Language - for free!

ASL (American Sign Language) University

Very cool...I've always wanted to learn, and the kids don't like the singing ASL program on PBS. ;)

On or By accident

Ok, this is somewhat educational, but more amusing than anything:

http://grammar.quickanddirtytips.com/on-accident-versus-by-accident.aspx

Biology Questions and Answers

http://www.biology-questions-and-answers.com/

Variety of Harvard Lectures

Harvard @ Home - http://athome.harvard.edu/archive

Top 10 Blog Hosting Sites

from About.com - http://personalweb.about.com/od/bloghosting/tp/bloghosting.htm?nl=1

I know most visitors here already have blogs, but in case anyone is looking for recommendations, I thought I'd share the above page.

Free curriculum tools from NASA

for educators teaching astronomy: http://astrophysics.gsfc.nasa.gov/outreach/educators.php