Polypad is like a digital playground for K-12 mathematics, offering an extensive collection of interactive virtual manipulatives. This free platform allows students to explore abstract concepts through a highly visual, tactile interface that uses tiles for geometry, algebra, fractions, and data science. Users can drag and drop objects such as prime factor tiles, fraction bars, and 3D polyhedra that fold and unfold onto a blank canvas. The tool includes unique features such as a balance scale for solving equations, logic gates for introductory coding, and a "music and sonification" tool that turns geometric properties into audible tones. While students can experiment without an account, a free teacher account unlocks access to a large lesson library, the ability to author custom activities, the ability to toggle specific toolbars to focus student attention, and the ability to save or share canvases via unique links.

tag(s): charts and graphs (196), fractions (179), functions (61), geometric shapes (153), logic (166), manipulatives (14), number sense (74), patterns (82), probability (132)