This site could be used as an extra help for students. There are many different types of games such as jeopardy and basketball to help students have fun while still working on math problems. Each section of games deal with certain concepts covered in the classroom.
This is a really interesting site that is like traveling all over the world, but staying at home. You can use the internet to learn about destinations, remember goals, play games, write a diary and so on. It seems like a strange site for teachers, but I actually think it would be really cool to use in a history class, a social studies class, or a foreign language class. Its like traveling the world, but staying in the same room. They can learn about the countries we're studying about and write some ideas or questions about it on their blog.