âHi! Korean 2B Workbook\" is a textbook that can be used together with the âHi! Korean 2B Studentâs Bookâ in class or for self-study. You can review content step by step, from replacement exercises to expanded practice, using the grammar you learn in the textbook. In the Self-Evaluation section at the end of each unit, answer questions about the vocabulary and grammar youâve learned to confirm your degree of understanding. Notably, book 2B can also be used to review beginner-level vocabulary, expressions, and grammar before studying at the intermediate level.