noun
regular curriculum; required subject
Refers to subjects or courses that are part of the official, prescribed curriculum, as opposed to extracurricular or optional activities.
この学校では、正課のほかにクラブ活動も盛んです。
At this school, club activities are also popular in addition to the regular curriculum.
正課として英語と数学が必修です。
English and mathematics are required as part of the regular curriculum.