Augmented Reality and Virtual Reality
Augmented reality (AR) is defined as "a live direct or indirect view of a physical, realworld environment whose elements are augmented (or supplemented) by computergenerated sensory input" (Wikipedia n.d.). Virtual reality (VR), on the other hand, is a simulated real-world environment that is created to enable users to believe that the environment is real. Both AR and VR can be used for education by simulating a real environment during the instruction process, providing learners with a better understanding and visualization of the subject matter (Kaufmann 2003). With the pervasive growth of the Internet of Things and wireless sensor networks, plus the wide accessibility of wearable technologies/devices, AR/VR technologies can be used to convert our physical contexts into 3D immersive learning environments that seamlessly integrate physical and digital worlds. A whole new learning experience with authentic, situated and timely response features is emerging. This obviously brings with it a great challenge of constructing a broad range of learning scenarios to be used in these virtual learning environments.