
A quick note about the Delicious "most popular" feed; it's a good place to find new resources, but it does populate quickly and is most commonly populated with links not related to education. That said, if you're willing to sort through the list, you can find some real gems.
Applications for Education
By my nature, I use a lot of humor (okay, cheesy jokes) in my instruction. For some people though, making lessons fun and humorous is not always easy. For those people, the Museum of Humor's lesson plan database could be a valuable resource.
Here are some related items that may be of interest to you:
Comprehensive Lesson Plans for Teaching Copyright
Writing Den - Writing Tips
Free Worksheets for Elementary Classrooms