math teacher
mathematics teacher

He hadn't known that his father was a math teacher.

I learned well from my father, a math teacher who also wrote short stories.

I think what our math teacher puts her mind to do is good as done.

In fact, your first guess would be: math teacher, high school.

"Are we a hundred percent sure it was this math teacher who took the children?"

He worked for a time as a math teacher and high school principal.

As your math teacher might have said, we "show our work."

He should have added that the only solution is to pay math teachers more.

"My math teacher feels that the child should have a house and the parents come visit," she said.

That brick house, by the way, was the home of our math teacher.