Teacher puts child in closet...

Tuesday, 28 Feb 12, our daughter's math teacher put her in a supply closet for most of the math period. He brought her out 5 minutes before the class ended and the whole class laughed at her and now she doesn't want to go to school.

We met with the school's assistant principle yesterday to demand our daughter get a different math teacher. The assistant principle said it definitely isn't school policy to put children in a closet and that he would investigate the matter, however, he also said they don't change student's teachers unless there are extreme reasons. He then said if this was the case, it was just one bad decision on the instructor's part and that it would be handled in-house but couldn't allow us to know what actions were taken, if any. My wife and I said we didn't care about what they do with him, we just want our daughter out of his class. The instructor in question has been with that school district for over 2 decades as a math and english teacher as well as a coach to 3 different girls sports teams. Today, we are meeting with some faculty and administrative people from the school. My question is what legal actions can we take if they don't satisfy our requirement of removing her from his class?