Avoid threatening, judging, lecturing or ridiculing. Children are best able to grow and learn in a home that uses a positive, authoritative approach. Allowing children to express themselves and openly communicate with you is an important part of a positive approach. Here are some common parenting styles that will cause a child to feel inadequate and unacceptable. Usually causes resentment, rejection and hostility from child.
Child feels threatened, frustrated or embarrassed.
Child may become defensive and resentful. You shouldn't feel that way. This may cause feelings of guilt, obligation and shame. Those grades are going to get you a long way. A true put-down.