校こう時じ

counter

school period counter

Used in educational contexts to count class periods, e.g., 1校時 (first period), 2校時 (second period).

• 1校こう時じは数すう学がくの授じゅ業ぎょうです。

  First period is math class.

• 今日きょうは6校こう時じまであります。

  Today we have classes up to sixth period.