Öğretmen okulda mı?

Yes or no questions can be formed by using the question particle "mi." [It has four forms: mı, mi, mu, mü].

"-mi" [etc.] is generally placed at the end of the sentence and
is spelled separately from the preceding word.

[See MORE ABOUT GRAMMAR: The Interrogative Particle "-mi" (Gr 9.1.1) at the end of the unit]

There is no special word order for forming questions in Turkish.