text: If technology was used in classrooms, it would not be valuable. The students in the classrooms sometimes want to hide how they feel about someone or something, and having a machine track what they feel, could trigger them. A student can sometimes hide their anger about a student or assignment, but if this was applied, it would be obvious. Another reason they wouldn't be valuable is because if it reads the wrong emotion of someone, they person's anger or emotion may rise and become an even larger ordeal. Someone can already tell what is felt just by looking at someone's face for the most part, as the author stated in paragraph 5, so there is no point to have to have a machine do the same thing. A friend would be also able to see if you are faking a smile or hiding what you really feel. The teachers also are another reason they wouldn't hold any value.