Let him know how you feel. Arrange a time when you can conference with him one-on-one to let him know of his behavior. Bring to his attention specific instances to pinpoint exactly what he's doing in case he's unaware. Let him know how it makes you feel when he provides this type of feedback. Be as clear and specific as you can.
Talk to other parents or students. Josh Lerman, the senior editor at Parenting magazine, suggested on CBS' The Early Show that you should see if the problem isn't just one that you're having. Ask others to see if the problem is isolated or if the teacher consistently dishes out negative comments.
Avoid being confrontational. Address the issue with the teacher without showing you're upset, even if you are. Remain calm and make plans to proceed to a higher authority. Document your instances so you'll have a history of the steps taken to attempt to solve the issue.
Reach out to the school guidance counselor, teacher's director or principal. Schedule a conference with and without the teacher so you can get to the bottom of the problem. Explain calmly, in detail, what the issues are and use examples of the teacher's behavior and comments. Ask them what their policy is for handling the situation. Make it clear that you want to see a resolution even if that means being assigned a new teacher.