text: "You can tell how a friend is feeling simply by the look on her face. Mos of us would have trouble actually describing each facial trait that appear" i agree with you can't actually tell how a person feeling just look the facial expression, using the technology it tell exacally how many percent the person is feeling so it would tell you how they are really feeling. As it say in the article "we humans perfom this same impressive "calculation" every day. Having the techonolgy in an classroom is not a good idea though. Why have a technology in a classroom when you know already how a student would feel about school.