our school; my school
A formal or slightly literary way to refer to one's own school, often used in speeches, announcements, or written contexts. 我が (わが) is a classical possessive meaning 'my' or 'our'.
The students of our school are well-mannered.
He is the pride of our school.
Standard kanji spelling; 我が means 'our/my' and 校 means 'school'.
Mixed kana-kanji spelling; less common but still used.
Compound of 我が (わが, 'my/our', classical possessive) + 校 (こう, 'school'). The reading わがこう is a regular combination.