Does your expression in the mirror suggest an emotion? I think the technology computers that reads students emotional expressions is valuable because it describes your mood depending on how you feel. In the text it states, if you smile when a web ad appears on your sreen, a similar ad might follow. If you frown, the next ad will be different. This is showing how the Facial Action Coding System works on different emotions. By the way, did making a happy face in this experiment also make you feel slightly happy? According to the text it states, Facial feedback theory of emotion, moving your facial muscles not only expresses emotions, but also may even help produce them. This is explaining how the Facial Action Coding System proccess works with your facial muscles and it produces the type emotions or mood your in. "Putting on a haapy face" actually works. According to the text it states, The Facial Action Coding System indicates the difference between a genuine smile and a forced one. This is explaing that if you try to over do your smile or over do a emotion it can tell if your not being serious or not. This is why i think the Facial Action Coding System is valuable for students because its good experience for different emotions your in gives you feedback on how you feel.