The rapid increase in the use of wearable technologies, especially Optical Head-Mounted Display (OHMD) devices, suggests potentials for education and requires more scientific studies investigating such potentials. In particular, the issue of information access and delivery in classrooms can be of interest where multiple screens and objects of attention exist and can cause distraction, lack of focus and reduced efficiency. This study explores the usability of a single OHMD device, as an alternative to individual and big projected screens in a classroom situation.