Two of the teachers at my school told me about a great tool for building a classroom website- Weebly.com It is pretty easy, you will have to play with it some.
While working to put together a website for my library students I found a website with a collection of some great educational sites for kids, parents and educators. The site is Fletcher Elementary School. I was very impressed with the collection of educational games that Mrs Haney put together for her computer lab. If you go to the links you could bookmark the sites directly and customize your own collection.