CCCS Ideas: Health and fitness websites, physical education websites, ways to infuse ELA and math into PE, etc
http://www.lepeinc.com/common-core-standard-ideas/

PE Universe: Read and share a variety of ideas through discussions, videos, and clipboard
http://www.peuniverse.com/Home.aspx

Spark PE: Many free webinars on current topics such as CCCS, nutrition, childhood obesity, etc
http://www.sparkpe.org/physical-education-resources/webinars/