A teacher has to not only teach and explain things but also has to understand the mindset of the students. A computer instructor will only be able to deliver the lesson but will not be able to understand the problems of the students. A teacher emotionally connects to the students to make them comfortable but this is not the case with a mechanical teacher.
Teaching can be best done by a person because then only will they be able to pass on the correct values and lessons to the students. Though smart classrooms are introduced, teachers are not replaced by machines. In the morning sessions, usually classes are very active. Teachers do fullfledged teaching. Afternoon sessions include activity-based jobs. Only teachers can have such kind of understanding of children’s psychology. Affirmatively we can say teachers can’t be replaced.