A teacher assigned to a class or homeroom; responsible for students' daily homeroom activities and overseeing their learning and welfare.
今年の担任教師は数学の専門で、面倒見がいい先生だ。
This year's homeroom teacher specializes in math and is very caring.
担任教師に相談して、進路についてアドバイスをもらった。
I consulted my homeroom teacher and got advice about my future path.
担任教師は出席確認や保護者との連絡も担当する。
The homeroom teacher also handles attendance checks and communication with parents.