1. A method using a video based teaching aid, the method comprising: recording video images of at least some of a plurality of people in a classroom setting by use of a video camera arrangement; identifying expressions of the people in the video images by use of an expression recognition module configured to receive the video images from the video camera arrangement; correlating the identified expressions of the people in the video images with at least one of an event or an outcome of an event occurring in the classroom setting by use of a correlation module; and outputting results of the correlating by an output device.