text: Recognizing facial expressions and different muscle movements can help determine how someone is feeling. Instead of, "we humans perform(ing) this same impressive "calculation"", we humans can use a more reliable source. The Facial Action Coding System can, "handle the complex algorithms used to decode". It can, "indicate the difference between a geniune smile and a forced one." Having this in a classroom can tell what students are actually feeling, and we humans wouldn't have to be forced to guess.