Preschool children are very small and they just know their parents and the small world around them and find themselves comfortable and safe in that world in which they know and recognize very few people. When they start going to preschool they find a totally new world with new character in it. If the child does not feel comfortable in the preschool or are scared of their teachers then they are not able to learn properly and do not respond to the teachers. There can be many other reasons when the child does not respond to the teachers.
If the child does not respond to the teacher in the school then parents must find out the reasons and take all proper measures and steps to remove these reasons. The child might be unable to cope with the changed schedule or find it difficult to communicate with strangers. Teachers should also take all necessary measure such that the students find them friendlier and are not scared of them. Teachers should also provide them proper environment to develop and pay proper attention to each and every child and plan regular meeting individually with each ones parents.