Kate Nowak is the Director K-12 Curriculum Strategy with Illustrative Mathematics. Illustrative Mathematics was one of the first comprehensive OER math series made available to anyone and everyone. Their 6-8 math curriculum has seen great success in schools across the country, and they are working on expanding into high school math, as well as elementary math. All of this work has taken several years to pull together, so I wanted to talk with Kate about how it came to be and how Illustrative continues to grow their offerings.If you want to learn more about how to get started with OER, please check out the New America project site called PreK-12 OER in Practice at newamerica.org/prek12oer. Here you’ll find information about how districts are doing this, including a map of districts using OER, as well as resources for getting started in your search, and for professional learning. You’ll also find the  #GoOpen District Launch Packet, which outlines the five most common phases of rolling out this type of work in a district. Illustrative Mathematics' website: https://www.illustrativemathematics.org/Illustrative Mathematics’ Twitter profile: https://twitter.com/IllustrateMathKate Nowack’s Twitter profile: https://twitter.com/k8nowak