text: In a public schooling atmosphere, mood is pretty much what makes or breaks how a class will go. If the students are sad or the teacher is moody, the class might be that much more of burden to deal with all the negativity. If a class is particularly boring, and the students are tired, the class might go on for ages. Plus, some material might be confusing for some students, and this will make the class much harder as well to understand and pass. As people, we tend to subconsiously figure out this kind of information as soon as possible, in order to better guess how they should behave. We do it so often, we as a people have gotten pretty good at this. So how useful would this technoogy be in this particular situation? Not very, since in a clasroom setting it is fairly easy to tell when a student is confused or bored. Now, there are other situations, some even still withing the guidelines of 'school', in which this technology would be used more often.