Help Teachers Increase the Rigor of Math Lessons

Your free rigor matrix is waiting for you!

Click the button below to download your free guide, Putting DOK into Practice with Hess’ Cognitive Rigor Matrix.


Use this guide to help teachers in your district raise learning to meet the rigor of both content and math practice standards. For more support or information on how best to improve math instruction and students’ math performance, call 888.249.6155 ext. 7 or email CORE’s Director of Mathematics, Dean Ballard, at