Message design is all around us, from the presentations we see in meetings and classes to the instructions that come with our latest tech gadgets to multi-million-dollar training simulations. In short, instructional message design is the real-world application of instructional and learning theories to design the tools and technologies used to communicate and effectively convey information. This field of study pulls from many applied sciences, including cognitive psychology, industrial design, graphic design, instructional design, information technology, and human performance technology, to name just a few. In this book, we will visit several foundational theories that guide our research, look at different real-world applications, and begin to discuss directions for future best practices. For instance, cognitive load and multimedia learning theories provide best practices, virtual reality and simulations are only a few of the multitude of applications. Special needs learners and designing for online, e-learning, and web conferencing are only some of many applied areas where effective message design can improve outcomes. Studying effective instructional message design tools and techniques has and will continue to be a critical aspect of the overall instructional design process. Hopefully, this book will serve as an introduction to these topics and inspire your curiosity to explore further!