Discovery Education has some great resources for teachers to use in their classrooms and many of these resources are free. The Streamathon is well worth your time.
For more information on the DE Streamathon and to register, please go here:
http://blog.discoveryeducation.com/connecticut/2010/09/07/streamathon-2010/
For more information on the Discovery Educator Network, please go here:
http://community.discoveryeducation.com/
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Discovery Education Resources
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Discovery Education New Teacher Survival Central