A diplomat of the old school.
An old-school English teacher.
An old-school cabaret singer.
That teacher's old school methods aren't effective, they're just annoying.
Man, I love that jacket; it's so old school.
Family experts are advocating a change away from the old school, advising parents not to medicate behavioral problems.
My mom's a good baker because she's of the old school. She'd never buy ready-made cookie dough.