Determine whether the teacher's treatment of your child is normal discipline or actual bullying. Ask your child pointed questions to ascertain whether the teacher is simply doling out appropriate discipline or belittling and haranguing your child.
Determine whether the bullying is emotional or physical or both. It's never OK for a teacher to touch your child in an aggressive way. Unlike the old days, teachers are now disciplined for using tactics like ear-pulling, hair-pulling, pinching or paddling -- all things that may have been common in the classroom when you were a child.
Arrange a meeting with the teacher, and express your concerns in a firm, yet calm, manner. Mention specific instances that your child has reported to you, and ask the educator for an explanation. Be prepared for a bullying teacher to downplay the incident, and listen to your own instincts about what you hear.
Give the teacher the opportunity to change the behavior. Once you've spoken, she knows that you are aware of her tactics. Ask your child to keep you informed regarding whether or not the previous behavior has resolved.
Arrange a meeting with the principal, if necessary, and insist that an appropriate intervention take place. Some teachers refuse to stop their bullying tactics based solely on a parental complaint. Others seem unaware that they are doing anything wrong. The mere fact that your child is afraid or intimidated, however, is reason to go over the educator's head.
Ask to have your child removed from the teacher's jurisdiction and placed in another classroom when the behavior continues after multiple attempts to resolve it. Go as far as you need to go to make this happen, even if it means addressing the school board or the superintendent. Your child's mental and emotional health are worth any inconvenience.