Side by Side 4 Extra Edition Activity Workbook with Digital Audio

Based on the proven methodology of the Side by Side series, Side by Side Extra enhances learning and instruction with the all new eText. The eText activities complement the program’s dynamic conversational approach and supports students’ independent practice for self-paced learning, including complete audio.

pre-intermediate basic beginner starter 初級 基礎 簡単 やさしい 易しい 基本 スターター 入門 レベル かんたん