http://betterlesson.com/mtp – the Master Teacher Project. All you have to do is make a template and share your lessons with teachers who are just like you!
http://www.gpsnetwork.org/ – not only can you find lesson plans already tied into the Common Core, this is a GREAT opportunity for you to make connections with fellow educators in a warm and supportive community.
http://www.nea.org/tools/LessonPlans.html – Be sure to check out the quick access tools on this very useful resource for common core lesson plans