Consumable. Vocabulary-building exercises require thinking but are fun to do. Teaches multiple definitions of words. Note: This workbook is part of an optional workbook series for those who want to supplement our "natural" language-learning approach. It is scheduled as optional in the Sonlight 100 Instructor's Guide. Sonlight resource: https://www.sonlight.com/products/wordly-wise-3000-book-8-workbook