#textbook__text__text_edition__schoolbook__school_text  a book prepared for use in schools or colleges; "his economics textbook is in its tenth edition"; "the professor wrote the text that he assigned students to buy"
  exclusion:  #trade_book
  supertype:  #book  a copy of a written work or composition that has been published (printed on pages bound together); "I am reading a good book on economics"
  subtype:  #crammer  a textbook designed for cramming
  subtype:  #introduction.textbook  a basic or elementary instructional text
  subtype:  #primer  an introductory textbook
     subtype:  #speller  an introductory textbook to teach spelling
  subtype:  #reader.textbook  one of a series of texts for students learning to read
     subtype:  #McGuffey_Eclectic_Readers  readers that combined lessons in reading with moralistic messages

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