Who is that group of people talking to the university president? - They are teachers.¿Quién es ese grupo de personas hablando con el presidente de la universidad? - Son profesores.
I don't like my teachers because they are too strict. - They are teachers, not your friends. They're supposed to be that way.No me caen bien mis maestros porque son demasiado estrictos. - Son maestros, no tus amigos. Se supone que sean así.