Do you think that teachers should know basic History and Science?

I am very concerned that too many so called educated American’s do not know American History and simple Scientific concepts.
I make typos but I know History. I understand how Cells work, how the Metabolism works, Basic Genetics concepts and Earth Science; and more.
Today I was speaking with a teacher and I refereed to the Hay Market Riots. She did not know what they are. Do you?
I believe American’s and the world can learn how to avoid problems by learning History.