Grid Spin vs Pythagoras Interactive

Grid • Spin-A-Win is a great way to introduce basic graphing concepts and coordinate pairs. The app presents a two-player game where the object is to place four tokens in a row using coordinates pairs. A player's turn consists of spinning two spinners to generate a coordinate pair. Once the coordinates are given the player needs to locate the position on the grid. Special sound effects make the app even more fun to use and the interactive design facilitates engaging learning strategies.

Eureka! An interactive illustration of the Pythagorean Theorem. Drag the legs of the right triangle and watch the three squares transform in real time. Every side shows its length, every square its area — in radical form when needed, so you'll see 2√2 rather than 2.828. Slide through a visual demonstration of Euclid's original proof from Book I of the Elements. Understand why the theorem is always true, not just what it claims.