e++ Probability vs Pythagoras Interactive

Students can choose an activity (tossing a dice, a coin or drawing a marble from a bag), and perform trials repeatedly to find out the probabilities of various events. Modern Educational Research Society develops a series of teaching tools and interactive App, to facilitate teachers in implementing scaffolding activities in class, and support students' self-directed learning at home.

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.