** http://quest.nasa.gov ~ Here you’ll find “free, web-based, interactive explorations designed to engage students in authentic scientific and engineering processes . . .”
** http://pbskids.org ~ This site offers videos, games, even shows.
** www.quizpoo.com ~ Called an “online this-or-that quiz maker,” quizpoo let’s you make up your own online quizzes on any subject.