Desmos offers best-in-class calculators, digital math activities, and curriculum to help every student love math and love learning math .

GeoGebra is an interactive geometry, algebra, statistics and calculus application, intended for learning and teaching mathematics and science.

Tools for Teachers - Educator-created lessons, activities, strategies, and professional development to help tailor instruction and boost learning.

3 Act Tasks - A whole group mathematics task consisting of 3 distinct parts: an engaging and perplexing Act One, an information and solution seeking Act Two, and a solution discussion and solution revealing Act Three.

Estimation 180 - by Andrew Stadel - Math Lessons that build number sense. Estimation tasks that make mathematical reasoning accessible to students and enjoyable.

Illustrative Mathematics - IM Certified™ curricula are rich, engaging core programs built around focus, coherence, and rigor.

Open Middle - A rich question bank full of problems that require deep levels of understanding that reach beyond procedural skills.

PhET - PhET provides fun, free, interactive, research-based science and mathematics simulations. We extensively test and evaluate each simulation to ensure educational effectiveness.

CanFigureIT Geometry - Created by teachers, this highly interactive tool provides an easy-to-use workspace where students can practice proofs while exercising their deductive reasoning muscles.

cK-12 - Provides a library of free online textbooks, videos, exercises, flashcards, and real world applications for over 5000 concepts.

Khan Academy offers practice exercises, instructional videos, and a personalized learning dashboard that empower learners to study at their own pace in and outside of the classroom.

Virtual Nerd - Over 1,500 video lessons covering Middle Grades Math through Algebra 2.

CODAP is free educational software for data analysis. This web-based data science tool is designed as a platform for developers and as an application for students in grades 6-14.

Achieve the Core classroom resources provides lessons and tasks that illustrate the focus, coherence, and rigor of college- and career-ready standards.

Edia - Create customized assignments and add questions from Pre-Algebra, Algebra I, Geometry, Algebra II, and Precalculus. Generates unique questions for every student, so the answers cannot be found online or shared between friends. Also features a new “anti-cheating mode” to thwart PhotoMath.