text: In paragraph 4, it quotes "Each expression is compared against a neutral face." When it comes down to the Facial Action Coding System, that would find out whether or not the students face expression is being sad, angry, happy and etc. No matter what the students face expression is or looks like. I feel as if this system would be greatly used in school's. It can save kids lives and help each and every one in the school and classroom's. I think that our principal should let teenagers use their phones during school. During free time will be the best policy. I agree that cell phones need to be turned off during class because you will not get an education or succeed. Why should we have cell phones during free time and not during class? Students need to pay attention in class and not goof off. They wont succeed if they are to busy texting someone. Free time is the best time that students need to use their phone or at lunch.