Close Air Support (CAS) and the Joint Terminal Attack Controllers (JTACs) who direct the fires and effects CAS delivers to support ground combat activities, have provided an important capability in both Operation Iraqi Freedom and Operation Enduring Freedom. Maintaining JTAC currency is thus a foundational aspect of Force Preparation; building the next generation of JTACs will help Secure the Future. High cost/large footprint fixed immersive CAS simulators like the Joint Fires & Effects Trainer System CAS Module at Fort Sill provide a verified, validated, and accredited alternative to live controls, but constrained resources, coupled with a significant requirement for qualified personnel, demand an alternative solution. Current head-mounted display (HMD) solutions offer limited simulation options for the tools JTACs normally use in their work: essential aspects of training and qualification. The Army Research Laboratory, Simulation and Training Technology Center (ARL STTC) developed a prototype implementation of Augmented Virtuality (AV) technology which promises to provide an immersive, cognitively challenging JTAC simulation solution offering a full suite of low-cost, JTAC tools as simulated military equipment surrogates. AV is a mixed reality technology which introduces real-world objects into a virtual scenegraph; as contrasted with Augmented Reality (in which synthetic objects are combined with a real world view), the user's principle experience and perception is of the virtual world. This paper will describe the conceptualization and development of this novel, Augmented Virtuality educational tool, including the software development; material fabrication; and hardware development and integration required to address and overcome the design challenges in this approach.