text: Another reason why the Facial Action Coding System is not needed in the classroom is because many classes in school are taught by a teacher, not by computers. The Facial Action Coding System might not be used at all if the school is taught by a majority of teachers, which could be a waste of money and software. Dr. Huang says in paragraph 6 that 'A classroom computer could recognize when a student is becoming confused or bored.' Even though this statement is true about the Facial Action Coding System, many lessons in schools are not taught by computers, but are taught by teachers. The teacher could also probably tell if the students are bored or confused so they could alter their lessons. In paragraph 5, the author says that, "In fact, we humans perform this same impressive calculation every day. For instance, you can probably tell how a friend is feeling simply by the look on her face" (D'Alto). This shows that the classroom teacher could effectively alter their lesson based on the expressions of the students, just as the Facial Action Coding System could.