If you don't like reinventing the wheel when it comes to lesson planning...NextLesson is for you!
The "About Us" link has this to say about their content...
NextLesson is the go-to place for Common Core projects, lessons and simulations. Our mission is teachers prepare students for the real world by offering engaging, rigorous and relevant content along with cool interactive instructional tools. Started by parents, guided by teachers, built for students. We hope to build a better tomorrow by working on one simple, driving question, "How can we prepare students for the real world?”
Grade level specific lessons can be found for ELA, Math, Science, and History. You can even search with their Common Core Browser for ELA, Math or Science Standards. A lot of them are free to download, others are purchased with "tickets".
You can access this resource through the direct link http://www.nextlesson.org
I'm an Instructional Coach at Daniel Island School in Berkeley County South Carolina.