Ohio Resource Center

Chock full of resources!
http://www.ohiorc.org/for/math/

Maximizing Learning Blog

Amber Caldwell has been compiling a list of common core task resources, on her blog, Maximizing Learning. 

http://ambercaldwell.wordpress.com/common-core-task-resources/

Share My Lesson

Share My Lesson has thousands of teacher created resources for grades 1-8.  You can create a user name and save them in the Share My Lesson site, save searches you have done, or share lessons you have created.  You can view them by topic (common core domains), format or even the type of lesson you're looking for (worksheet, game tutorial...)

http://www.sharemylesson.com/teaching-resource/Mathematics-Project-Ideas-50000220/ 

Engaging in the Mathematical Practices (look-fors)

Got this very helpful document from the Common Core Math Library I posted earlier.  This will be SUPER helpful for planning this year! 

http://www.mathspecialists.org/AMTE/ems&tlSFMPStudentTeacherLookFors.pdf

Common Core Math Library

Here's a link to another person's blog, dedicated to doing what I'm doing; making common core math resources accessible in a single place.

http://ccssmlibrary.blogspot.com/

Math is Fun

This is a wonderful site for supporting concepts that kids may not have understood in class, or were absent.  The site walks through concepts in a tutorial fashion and provides a few practice problems as well.  It's not common core aligned, but is a great resource.
http://www.mathsisfun.com/

NRICH- enriching mathematics

The NRICH Project aims to enrich the mathematical experiences of all learners. To support this aim, members of the NRICH team work in a wide range of capacities, including providing professional development for teachers wishing to embed rich mathematical tasks into everyday classroom practice.


http://nrich.maths.org/frontpage