PBS has some great resources for educators, including Teacher Activity Packs which are collections of lesson plans and resources from PBS to use with the lessons and PBS Parents which has parenting tips and advice, which is also good for educators. There are also tons of educator resources to go with their programs like Nova. There are educator discussion groups, professional development resources, and much more.
I just learned about another PBS education resource from Vicki Davis' Cool Cat Teacher Blog (which is an awesome resource in itself). PBS Teachers Technology Integration which provides resources and best practices for integrating technology into the classroom to improve instruction and student learning. Categories include assistive technologies, distance education, emergency technologies, internet safety, student learning and much more.
This is a great site to find technology resources and to also find resources to help use that technology to improve teaching and learning.