"Учитель і директор"

Translation: A teacher and a principal

[Andrew.Broz]

In this context, school principal is a very appropriate translation of the word директор.

[tnovi]

Are вчитель and учитель used interchangeably?

[NazarBodan]

Yes.

[UKTerry]

Only had one A to put in the sentence so theoretically I could never have said
A teacher and a director