She needs her ass beat. Nothing was wrong with that baby's hair and she had no authority to touch it. There is no way to justify this. Her hair has nothing to do with school or her ability to learn. WTF did she think would happen by doing this.
She has no idea how this will affect her self esteem for years to come. Basically she told her your hair that naturally grows out of your head is ugly and you're not pretty. Her parents will have to invest so much into her self esteem and confidence now to erase this bs and build her back up. Her face in that pic broke my heart.