text: In conclusion, the face could have been made by something other than aliens. The three reasons explaining why it couldn't have been aliens is it could have been done by nature, it can happen somewhere else, and are aliens capable of this. This can prove that aliens didnt build it, that it could have been made by different things.I believe that using the Facial Action Coding System to read the emotional expressions of students in a classroom can be valuable. It could be valuable becuase it could allow a teacher to know what a student is feeling. For example in the text Dr. Huang says " A classroom computer could recognize when a student is becoming bored or confused." So this technology could very much be useful in the classroom to help prevent a student from staring off into space. Teachers could also benefit from this technology by being able to tell if a student has become confused and can then help that student.