text: Classroms should have the Facial Action Coding System so the teacher can know if you are in a good or bad mood because some people dont show it. Teachers need to know how their students are feeling because they might call on them in class to answer a qusetion not knowing that the student is in a bad to answer the quwstion. In the text it states," Of course, most of us would have trouble actually describing each facial trait that conveys happy, worried, etc. Yet Dr. huang observes that artists such as da Vinci studied human anatomy to help them paint facial muscles precisely enough to convey specific emotions." This quote support my answer because its hard to tell if a person upset or need time to be alone so he or she can cool down. Having a FACS computer in classroom will really help teahers know if there something upsetting there students.