textbook; coursebook; schoolbook
Standard word for a textbook used in schools or courses.
新しい教科書を買った。
I bought a new textbook.
この教科書はとてもわかりやすい。
This textbook is very easy to understand.
I read the textbook before class.
This story appears in the textbook.
He answered exactly as the textbook stated.
The teacher told us to open our textbooks.
MEXT-approved textbook; government-authorized textbook