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"Well-designed animations may help students learn faster and easier." (wikipedia)

Animation is actually an influential tool when teachers come to explaining difficult, abstract theories to students. Animation provides a vivid introduction of what the item is so that students can have a better understanding. For example, when referring to Newton's law of universal gravitation, one teacher said "it  states that every massive particle in the universe attracts every other massive particle with a force that is directly proportional to the product of their masses and inversely proportional to the square of the distance between them." while another teacher illustrated it with an animation. Obviously, after watching this animation we can get a conclusion that it is really an helpful tool to facilitate learning. 

We should also know the history of animation in order to make full use of it.