課か外がい授じゅ業ぎょう

noun

extracurricular lesson; out-of-class lesson

Refers to a lesson or class conducted outside the regular curriculum, often as a special activity, field trip, or supplementary session.

• 今日きょうの課か外がい授じゅ業ぎょうで博はく物ぶつ館かんに行いきます。

  We're going to the museum for today's extracurricular lesson.

• 課か外がい授じゅ業ぎょうとして、地ち域いきの清せい掃そう活かつ動どうに参さん加かした。

  As an extracurricular lesson, we participated in a local cleanup activity.