Here are some more excellent resources to use with kids in grades K-12!
Kindergarten: PBS Kids Super Why! Super Readers Challenge
This is a great game to help little ones become comfortable using a mouse and keyboard while working on their phonics and beginning reader skills. Once they complete their certificate, you can reward them with playing the other games on the site.
1st-2nd: TVO Kids Spelling Bee. Want to help prepare those pre-FCAT little ones to hone their spelling skills? This game makes it exciting to spell correctly. I did this in a 30 minute library media class. Once the kids correctly spelled 20/25 words, they were permitted to go on the other games on the site.
3rd-5th: National Geographic Kids. I cannot rave about this site enough! We did a Reading Informational Text lesson on countries around the world and the kids were completely engrossed.
6th-12th: Sliderocket! Students will need their own email address to sign up for a Sliderocket account. This is a program designed to make presentations that are worthy of the 21st century!