2020 - 2021 AJHD study guide for the individual subject test in Social Studies for the 2020 - 2021 Catholic Schools Academic Junior High Decathlon based on the book A Little History of Economics. The study guide reviews the history of economics and economic theories. The study guide includes vocabulary, review questions, quizzes, matching worksheets, two 50-question multiple-choice practice tests, and access to Quizlet online classroom. Answer keys included. Developed by the test writers for the 2020 - 2021 Academic Junior High Decathlon.