ordinary teacher; rank-and-file teacher
Refers to a teacher without a special title or administrative role, such as a classroom teacher who is not a head teacher or principal. Often used in contrast to 教頭 or 校長.
He has worked for many years as an ordinary teacher.
The salary of a rank-and-file teacher is lower than that of a manager.
Compound of 平 (ひら, 'ordinary, plain') and 教員 (きょういん, 'teacher, instructor').