Throughout history, teachers were making discoveries, taking actions, or participating in events that forever changed the world. Today we'll look briefly at 8 teachers who changed history. Pythagoras was a mathematician, philosopher, and teacher who’s theories are still taught in schools. He’s best known for the Pythagorean Theorem that relates to right triangles, however, he also determined the relationship of math to music and the movement of stars and planets. Later in his life, Pythagoras was a teacher in India and founded a Croatian institute where he taught philosophy. He also founded the Pythagorean Brotherhood, a secret society devoted to the study of mathematics. Known as the person who established the theory of gravity, Sir Isaac Newton was also a