noun
textbook; school textbook
Formal term used in educational contexts, synonymous with 教科書 but more official.
See also: 教科書
教科用図書は文部科学省の検定を受けている。
School textbooks are authorized by the Ministry of Education, Culture, Sports, Science and Technology.
教科書 is the common, everyday word for textbook. 教科用図書 is a more formal, official term used in legal or administrative contexts.
Compound of 教科 (subject, curriculum) + 用 (for use) + 図書 (books). The exact historical derivation is uncertain; the term is conventionally used in official educational contexts.