Geoboard, by the Math Learning Center

The Geoboard app is a tool for exploring a variety of mathematical topics introduced in the elementary and middle grades. Learners stretch bands around the pegs to form line segments and polygons and make discoveries about perimeter, area, angles, congruence, fractions, and more.

This virtual version of the manipulative is an open-ended educational tool, ideal for elementary classrooms and other learning environments that use laptops, Apple devices (e.g., iPhones, iPads), Chromebooks, or Windows devices.

The Geoboard is a key component of Bridges in Mathematics second edition. Online preview available.