My child has been sexually assaulted in play school. I am very very distressed and angry. I want her to lead normal life. How can i help her?

This is very sad to hear. @hui has made some very good recommendations. Firstly, get her checked both physically and psychologically to get a better idea of her state. Also, these experiences are traumatic so it's best if handled with love and care. Definitely, file a police report to find out who did this and even if you know who did this make sure the person is punished for such a heinous act. Wish her all the very best.