homeroom teacher
担任の先生は私のお母さんと同じ年だ。
My homeroom teacher is the same age as my mother.
彼らの担任の先生は誰ですか。
Who is their homeroom teacher?
彼らが担任の先生を大好きになるとは思ってもみなかった。
I never thought they would come to love their homeroom teacher so much.
母は担任の先生と会う予定である。
My mother is planning to meet with my homeroom teacher.
彼女は担任の先生を非常に尊敬しています。
She has great respect for her homeroom teacher.