Teacher as a title

Dear Friends at UsingEnglish.com,

Is the word TEACHER a title like MR, DOCTOR, etc? If so, can I use it without the last name as in Teacher David? or must I use it as in Teacher David Brown or Teacher Brown?

Thanks in advance,
Andre Barros

[Casiopea]

It's not a name or even part of a title. It's an occupation:

Ex: Who is your teacher, your lawyer, your postal worker?
Ex: This is Max Smith, my teacher.

Exception:

Ex: "Teacher!" I need your help.


Does that help?

[Delmobile]

"Professor," however, is used as a title. I believe there are various rules that differ from country to country about when an individual is entitled, no pun intended, to the honor of being addressed as "Professor Smith." But I do not know these rules :(


[Disclaimer: I am a native speaker but do not teach]