expression, godan verb (-tsu)
stand on a podium; stand at a lectern
Literal physical action of standing on or at a teaching platform, often in a classroom or lecture hall.
先生が教壇に立って授業を始めた。
The teacher stood at the podium and started the class.
expression, godan verb (-tsu)
Figurative extension: to work as a teacher or to take on the role of an educator, emphasizing the act of teaching in a classroom setting.
彼は高校で教壇に立っている。
He teaches at a high school.
教壇に立つのは初めてなので緊張する。
I'm nervous because it's my first time teaching.