Mathemagic Sandbox is a free, interactive mental math curriculum designed for classrooms and homes. Every trick page follows a consistent structure: a clear lesson explaining the mathematical principle, an interactive sandbox where you can see the trick work in real time, and a downloadable practice worksheet.
The curriculum progresses through four levels: quick hooks (Level 1), mental addition and subtraction foundations (Level 2), flexible multiplication strategies (Level 3), and show-stopping mathematical performances (Level 4).
Built with Next.js, React, and Tailwind CSS. All sandboxes compute results entirely client-side with no external API calls. The site is fast, lightweight, and works on any device.