The main subject is the process of learning and how computer graphics and visualization support it. This book has a more specific mission beyond general instructional to exploit the potential of visualization techniques to enhance and improve learning. Graphics long have been a common part of all instructional strategies. Many of the most valuable principles of how visuals can help learning have been identified apart from computer applications. Therefore, designers have much to gain from applying the general theory and research related to visuals, memory, and learning to instructional design. There is no question that the computer offers unprecedented graphical power for all designers, instructional and otherwise. The range, power, and number of graphical tools for desktop computers are increasing at an astonishing rate. Some of these tools, such as those that provide learners with "real-time, on-line" interaction, offer potentially new learning environments that would not be possible without computer technology. All this often creates a sense of urgency among designers and developers to know and incorporate the latest graphical tools in their courseware. However, one needs to remember there is a need to exploit the graphical power of computers for learning but not fall prey to the idea that using the latest technology is a substitute for good design. This book is written for the professionals who design and develop these environments in both formal and informal settings. These individuals are usually referred to as instructional designers and/or instructional developers. It is relevant to anyone concerned with or involved in designing graphics for instruction.