How do you say goodafternoon teacher in spanish?

The most common way to say "Good afternoon, teacher" in Spanish is:

Buenas tardes, profesora/profesor.

* Buenas tardes: Good afternoon

* profesora: teacher (feminine) Use this if your teacher is a woman.

* profesor: teacher (masculine) Use this if your teacher is a man.

You could also use a more informal option, depending on your relationship with your teacher:

Buenas tardes, profe. (This uses a shortened, informal version of "profesor/profesora") Only use this if appropriate for your relationship with the teacher.