The document provides guidelines for creating effective multimedia materials based on research in cognitive psychology and multimedia learning. It summarizes several key principles supported by Richard Mayer's research, including the multimedia, spatial contiguity, temporal contiguity, coherence, modality, and redundancy principles. The guidelines recommend including words and pictures rather than just words; presenting corresponding words and pictures near each other on the screen; presenting words and pictures simultaneously rather than successively; excluding extraneous material; using animation and narration rather than animation and on-screen text; and eliminating redundant information. The principles are stronger for low-knowledge versus high-knowledge learners.