Classroom Resources Main Page
NCTM is committed to offering standards-based resources that improve the teaching and learning of mathematics for each and every student.
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ARCs are Activities with Rigor and Coherence. Each ARC is a series of lessons that addresses a mathematical topic and demonstrates the vision of Principles to Actions: Ensuring Mathematical Success for All.
Members can browse curated libraries for elementary school, middle school, and high school resources organized by grade and topic. Click on a folder to expand and double click on a resource on the right.
In order for high school students to be engaged in reasoning and sense making in the classroom, the task—what students are asked to do—is critical. While linking the task directly with NCTM's Focus in High School Mathematics: Reasoning and Sense Making, NCTM's Principles and Standards for School Mathematics, and the Common Core State Standards, each item addresses task design, teaching design and student engagement.
NCTM members can browse the extensive archive of Students Explorations in Mathematics activities and materials. Many activities are hands-on and related to popular topics that can be tied in with other units, such as sports, elections, nutrition, and more.
Access quality standards-based resources for teaching and learning mathematics, including interactive tools for students and instructional support for teachers. Lessons and activities on Illuminations align with NCTM's Principles and Standards for School Mathematics and the Common Core State Standards.
More than 60 sets of math problems and supporting materials are free to members.