ARKive! - world's species of animals

This is a beautiful site that has videos and pictures of endangered animals. http://www.arkive.org/

There are very clever photos and information about animals that are endangered - a great place for students to start their reports.

Alternative to Wordle

Word it Out is a good alternative to Wordle. It has a bit more customization features and seems to have a bit of a censor built into what is displayed. Wordle is not really as kid friendly.
http://worditout.com/

KS2 Bitesize Science

This is a great site. http://www.bbc.co.uk/schools/ks2bitesize/ This BBC site has lots of science, English and math interactive pieces that can be embedded in your webpages or just used on a computer. You do need to have Flash installed on your computer. I have found that even if I have Flash installed, sometimes a few of the interactives don't work right away. I really recommend that you spend some time looking at this site.