My 9 years old't public school teacher said to the class that she hates Russian people, which was very offensive to us.?

What legal steps do we have to take to punish that teacher for making such hateful statements? We reside in California.
Update: We spoke to the principal and the teacher denying saying those words. Our school district is mostly dysfunctional and mostly on the teacher's side. By legal steps I meant somebody of higher hierarchy.
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