I stumbled on to Henrico County Public Schools eLearning page and thought it was just your typical "resource links" page. Wow, was I surprised to find so much more under the surface!
The English and Math pages are chocked-full of thoughtfully assembled curriculum resources. These are too good to just bookmark and forget, so I am going to put them here for future reference.
There are many, many, many teacher-created English lesson plans. And an entire online curriculum for grade 6-12 Math. I was especially impressed by the Algebra 1 modules and the integrated GeoGebra applets.
GeoGebra was a great find in itself. It's open-source, cross-platform mathematics exploration software. Here is the main page to download your own copy and a wiki with resources and sample problems.