workbook

/W ER1 K B UH0 K/
noun
  1. 1

    A book, used by a student, in which answers and workings may be entered besides questions and exercises.

  2. 2

    A book, used by a business, containing a record of work to be done, or work completed.

  3. 3

    A collection of spreadsheets stored in the same file.

Source: https://en.wiktionary.org/wiki/workbook