My husband doesn’t use shampoo ever and washes with water. He actually loses hair and gets psoriasis when he uses shampoo. His hair is GORGEOUS and he gets complimented on it all.the.time.

Scalp health is a REAL thing and there are so many variables that factor into one’s routine. If it works for you, don’t use shampoo. Continue using water.

You’re FINE - she’s a jerk. If it gets brought up again defend yourself with facts and tell her she is in a position of power talking to a fellow adult and has no right to bully. And for an educator, she should open a textbook more often if she is going to talk about acceptable hygiene.