text: For the benefit of the students wouldn't it be great if the teacher could tell if someone was confused. If the teacher could tell that then the teacher could offer some one on one help or have a classmate explain it to them. If a student was having trouble with something and they were contemplating just giving up the additional help could work to push them forward. If the student is a high school student and they were strugling in class and got some help and things became clear maybe that would motivate them to try more resulting in better grades and that would lead to possibly scholarships. If students realized something and then it became easy and possibly even fun for them they might find what they want to do in life. It would aslo help to lower dropout rates if students enjoyed what they were doing.