text: The use of the technology can read the emotional expressions of students in a classroom is valuable. It helps to understand students feelings, or reactions about the lessons, thus the teachers can recognize what are things helpful, and unhelpful. From that, the effective in studying will be increased. Besides that, it also brings advanges in communication between parents and child. The adults could realize their kids are struggling with something or not. Then, they could find the ways to share, or help. In order to not let anything bad could occur, as having negative thinkings and lead to suicide.      Dear,