My 4th period teacher can't teach!?

My 4th period teacher can't teach Social Studies! She wrote writing riting and can't pronounced Diocletion so she said Bill Clinton. Just yesterday, she pronounced museum muslium, feudal federal, etc. cuz it's too much to put. She gives us false info. like the Huns r the Hans. I want to p this cl and at least learn something. What should I do?