noun
homeroom teacher; class teacher; form teacher
Refers to the teacher responsible for a specific class or homeroom in a school, handling administrative and pastoral duties.
担任教師が生徒の出席を確認した。
The homeroom teacher checked the students' attendance.
彼女は私の高校の担任教師でした。
She was my homeroom teacher in high school.
Compound of 担任 (たんにん, 'in charge of a class') and 教師 (きょうし, 'teacher').