To my teacher followers if your school has moved to Common Core standards you will love this site. This site is filled with teacher uploaded assessments based on Common Core standards. Make sure you share what you created and follow me on there too! :)
Common Core math standards and activities for each standard for all grades Pre-K through High School. Even if you do not have an IXL membership, you can you the list of activities as suggestions for activities for the classroom.
Common Core Standards -- website of a district who has laid out each part of the CCSS and made a unit/scope and sequence to go along with it. They've made a lesson for every.part.of.the.core!!! ~~This is amazing!