Check out this website for online interactive math activities. From the website:
The National Council of Teachers of Mathematics is a public voice of mathematics education, providing vision, leadership, and professional development to support teachers in ensuring mathematics learning of the highest quality for all students. With 100,000 members and 250 affiliates, NCTM is the world’s largest organization dedicated to improving math education in preK‑12.
Illuminations is designed to:
- Provide Standards-based resources that improve the teaching and learning of mathematics for all students.
- Provide materials that illuminate the vision for school mathematics set forth in Principles and Standards for School Mathematics, Curriculum Focal Points for Prekindergarten through Grade 8 Mathematics, and Focus in High School Mathematics: Reasoning and Sense Making.
Illuminations is part of the prestigious Verizon Thinkfinity program.