text: Understanding how teenager feels is hard even for parents ,so how can teachers how students feel. A lot of us teenagers sometimes lie about how we feel or if we understand your lesson plan, but with Facial action Coding System teachers can see how we feel about all of theses new things were learning. This is an effective way teachers can see if we feel sad and bored. Even with a fake smile teacers can see if your telling the truth. Yes, every student isnt the same , but I think having this technoloy thats how can understand what each studnets need to help out every student.