noun, noun, used as a suffix
Used for a unit of study in a textbook or a class session. Common as a suffix in words like 第一課 (Lesson 1).
今日は第３課を勉強します。
Today we will study Lesson 3.
この教科書は全部で１２課あります。
This textbook has 12 lessons in total.
noun, noun, used as a suffix
Refers to an organizational unit in a company, government office, or similar structure. Often used as a suffix, e.g., 人事課 (Personnel Section).
彼は営業課に配属された。
He was assigned to the Sales Section.
総務課に問い合わせてください。
Please contact the General Affairs Division.
counter
counter for lessons/chapters
Used to count lessons, chapters, or sections in a book or course. Follows a number, e.g., 一課 (one lesson).
今日は２課進んだ。
We covered two lessons today.
この本は全部で１０課ある。
This book has ten chapters in total.