What is ""หนังสือเรียน"" in American English and how to say it?

Thai

หนังสือเรียน

หนังสือเรียน-textbooks.svg
American English

textbooks

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Example sentences

American EnglishA school janitor is responsible for the security and maintenance of a school building and grounds.

""หนังสือเรียน"" in 45 More Languages.