I'd talk with the teacher first, see what's up. It *might* be a simple misunderstanding.

Several years ago, a little girl at my then-church was telling everyone that I don't wear clothes. (!!!) I got a translation from her mother: the kidlet said I don't wear clothes, that I wear jeans -- and jeans are not clothes. To her three-year-old mind, "clothes" meant skirts and dresses.