Attaches to school names or types to form the name of a school, or used as a counter for schools. Common in compounds like 小学校, 中学校, 高等学校, and in counting expressions like 一校.
There are three high schools in total in this town.
There are three elementary schools in this town.
He attends a private school in Tokyo.
Refers to the act of proofreading or a proof sheet. As a counter, it counts proofs or proofreading rounds (e.g., 初校, 再校). Often used in publishing contexts.
The first proof of the manuscript has come in.
The proofreader checks up to the third proof.
学校 is the full standalone word for 'school', while 校 is a bound suffix used only inside compound names like 高校 or as a counter for schools.
校正 is the full noun/verb for 'proofreading', while 校 alone is a shorter counter used in terms like 初校 and 再校.
The kanji 校 originally meant 'wooden shackles' or 'to compare/examine'. Its use for 'school' comes from the idea of a place of learning and examination. The proofreading sense derives from the meaning 'to examine'.
alma mater; one's old school
changing schools; transferring to another school
inside a school; on school grounds; within the school
main school; principal school · this school; our school
opening of a school; establishment of a school
school rules; school regulations
leaving school; going home from school
temporary school closure; school closed
proofreading; proofread · calibration; calibrate
the whole school; all students and staff · all schools; every school
boys' school
schoolyard; school grounds; campus
school song; school anthem
the same school · the said school; the aforementioned school
another school; other schools
school closure; closed school
school of one's choice; preferred school
school gate
this school; our school
theological school; seminary
revision; proofreading