Illuminations, is a free online math resource created by the National Council of Teachers of Mathematics (NCTM). It offers a wide range of interactive lessons, games, and activities for students in grades K–12, covering key topics like number sense, geometry, algebra, and data analysis.
Designed to make math more engaging, the resources use visuals such as graphs, diagrams, and animations to help students connect and explore concepts in a meaningful way.
Navigation is simple, just use the sidebar to select a specific grade level and instantly access materials aligned with that curriculum. Whether you're a teacher, student, or parent, Illuminations provides easy-to-use, high-quality tools to support math learning at every level.