It is undoubtedly true that some advanced computers can explain and teach lessons to children in a more user friendly and a more efficient manner than teachers can teach the same children. But a computer can never replace the one on one interaction a child has with his or her teacher when it comes to asking specific questions about the material.
I think that teachers are our second parents. Teachers can share their knowledge with us. They mind our mistake at every step of our life. They can solve all our problems. They can feel our emotions,our feelings. Machine can't understand humans. They only gave solutions. So the role of teachers in our life is very important.