Funbrain - This site offers games and learning activities that are suitable from preschool to Grade 8. Teachers can easily create custom made quizzes for students to answer online. Houghton Mifflin Site - A site which provides many learning activities suitable for kids. Poetry for Kids - A nice collection of children's poetry of mostly a humourous nature. Kids Publishing - An easy way for students to write and publish stories and articles.
Kids are able to track how many people have read their stories.
This site is divided into 2 ages. Below 5 and 6-9. Has good problem solving activities. I now use it as a homepage in the lab. You could use it as well or make your own.