"During the past 10 years, the field of multimedia learning emerged as a coherent discipline with an accumulated research base that has never been synthesized and organized in a handbook. The Cambridge Handbook of Multimedia Learning constitutes the world's first handbook devoted to comprehensive coverage of research and theory in the field of multimedia learning. Multimedia learning is defined as learning from words (e.g., spoken or printed text) and pictures (e.g. illustrations, photos, maps, graphs, animation, or video). The focus of this handbook is on how people learn from words and pictures in computer-based environments. Multimedia environments include online instructional presentations, interactive lessons, e-courses, simulation games, virtual reality, and computer-supported in-class presentations. The Cambridge Handbook of Multimedia Learning seeks to establish what works (i.e., to determine which features of a multimedia lesson affect learning), and to consider when and where it works (i.e., to explore the implications of research for practice)."