professeur
To say "the teacher is friendly" in French, you would say "le professeur est sympathique."
the teacher chair is called 'la chaise du professeur' in French.
a music teacher is un / une professeur de musique in French.
l'enseignant(e) a....
mme.
"enseignante"
Physical education teacher is "professeur d'éducation physique" in French.
You can introduce an English teacher to a French teacher by saying, "Bonjour, this is [English teacher's name]. They teach English, and are interested in connecting with you to share teaching ideas and collaborate."
enseignant(e), prof
"I like the teacher" is J'aime bien le professeur
Regarde le professeur.