Everything you need to know about the mathematics in the common core standards is in these Progression documents. Take a look. They are like a mini seminary for math at each grade level in a couple nifty pages. Click on a domain and scroll to your grade level. Super helpful.
FREE PLATFORM FOR COMMON CORE-ALIGNED LESSONS. The National Education Association and the for-profit firm BetterLesson today unveiled a jointly designed, $7 million free platform with more than 3,000 lessons aligned to the Common Core State Standards.