- Browse the subject index archive below About the Ten Cool Sites If you have an educational site you'd like to suggest, send it to 10cool. Please put the word cool in the subject heading of your e-mail. Thanks to everyone who contributed this month. To print this page: In MS Explorer, go to Print Preview and check the print backgrounds box. In Netscape, switch Page Attributes to Netscape ...www.exploratorium.edu/learning_studio/sciencesites.html