Discovery provides tools for teachers, students, parents and schools - this is beyond the videos (formally from United Streaming) that most of our local schools have a subscription to. Here are five "tools" you might find useful.
As always, share and share alike as we are all more knowledgeable when we collaborate.
Discovery site encouraging interaction & exploration on various topics.
Kathy's site is pretty comprehensive with some great finds for any educator.
If you want to learn about some other Discovery Tools, you might check out this blog post by the Educational Technology Guy.