military academy, (especially) the Imperial Japanese Naval Academy

complete denial of knowing (an incident in question)

(historical) elementary school, national elementary school

school supported by a pro-South Korean organization

school supported by a pro-North Korean organization

to know through one's own experience

school grammar / (specifically) Japanese school grammar, based on Shinkichi Hashimoto's work and now universally employed in Japanese schools and dictionaries.

school for special needs

to have no way of knowing; to be completely ignorant of

to make known