Interaction Design is intended to teach the underlying theory behind the design of interactive devices. Much research has been done since the introduction of interactive displays, keyboards and pointing devices which provide designers with models and good advice on how to design and interconnect the technology. The course will be focused on these models and on teaching students how to use them to build designs and to evaluate their designs. Students will also be introduced to relevant principles of cognitive psychology in order to apply this knowledge to design decisions, e.g., what types of mental models can we encourage users to build of the interaction process? The course is an overview of interaction design theory. Each of the two week modules could readily be a course in itself. Design is changing dramatically because technology has moved off the desktop and become pervasive. As such, the trade books covering design problem A with device B are inadequate, if not often wrong. This course is therefore an important introduction into the theory of design that will help the graduating student in UXD to approach the unique design problems expected in the future.