The Facial Action Coding System is should not be use in classroom, or in anywhere. It's not good to know how everyone feels about each others, because if we do know how we feel about each other we will all hate each other. Even for a computer it's not good to know how humans feels about the other human, only polices should have this device because if the polices cought bad guys they will use it to them. According to Prof. Thomas Huang this device can recognize the subtle facial movements humans use to express how humans feel. However, this device is still not trust worthty because if this device did not tell the truth every would hate each other. A computer that knows when you're happy or sad is not good for humans. For example, if this Facial Action Coding System could be use in humans kids will not have go to school anymore because they will start doing something else. The Facial Action Coding System should not be use in anywhere.