Illustrative Mathematics
Illustrative Mathematics provides guidance to states, assessment consortia, testing companies, and curriculum developers by illustrating the range and types of mathematical work that students experience in a faithful implementation of the Common Core State Standards, and by publishing other tools that support implementation of the standards.

Inside Mathematics
This site features classroom examples of innovative teaching methods and insights into students learning, tools for mathematics instruction, and video tours of the ideas and materials on the site. Their expanding list of resources include connecting to the CCSS for mathematics.

Dan Meyer Video: Math Class Needs a Makeover
At TEDxNYED, Dan Meyer shows classroom-tested math exercises that prompt students to stop and think.

California State Standards K-8 Learning Progressions
“Mathematics: Kindergarten through Grade Eight Learning Progressions” professional learning module

California State K-12 Standards for Mathematical Practice
“Mathematics: Kindergarten through Grade Twelve Standards for Mathematical Practice” professional learning module.

Sample Math Performance Tasks
A collection of links to databases of math performance tasks at all levels.