For hundreds of years verbal messages - such as lectures and printed lessons - have been the primary means of explaining ideas to learners. In Multimedia Learning Richard Mayer explores ways of going beyond the purely verbal by combining words and pictures for effective teaching. Multimedia encyclopedias have become the latest addition to students' reference tools, and the world wide web is full of messages that combine words and pictures. Do these forms of presentation help learners? If so, what is the best way to design multimedia messages for optimal learning? Drawing upon 10 years of research, the author provides seven principles for the design of multimedia messages and a cognitive theory of multimedia learning. In short, this book summarizes research aimed at realizing the promise of multimedia learning - that is, the potential of using words and pictures together to promote human understanding.