校: school; proofread; calibrate. JLPT N5; 10 strokes.
校 means 'school' and, in a more technical sense, 'correct, compare a text'.
On reading: コウ in 学校 (がっこう, school), 高校 (こうこう, high school), 校長 (こうちょう, principal), 校舎 (こうしゃ, school building), 母校 (ぼこう, school where one studied), 下校 (げこう, school exit), 休校 (きゅうこう, school closure). In the sense of 'correct': 校正 (こうせい, proofreading).
It has no common kun readings.
Remember: in school degree names 校 appears at the end: 小学校 (しょうがっこう, elementary school), 中学校 (ちゅうがっこう, middle school), 高等学校 (こうとうがっこう, high school), abbreviated as 高校.
学校は八時からです。
gakkou wa hachiji kara desu.
School starts at eight.
Follow the steps in order. Each new stroke is highlighted.
Stroke paths: KanjiVG, CC BY-SA 3.0. Sequential diagrams derived from the original paths.