Surfing on the web I have found an article about Walter Lewin, a physics professor at MIT. His classes are a spectacle. About 1,000 people download his videos each day. His book "For the love of physics" was edited in Spanish two weeks ago. He has started a revolution in the way of teaching. So listening people like Walter Lewin, we realized that with profesors and teachers like him, the number of students who enjoy learning increase and only one person can change the future of many students.