In-class homework workbook 2022 Smart classroom exercises 12345 Smart homework for Chinese, Mathematics and English in grades one, two, three, four and five. This is an in-class exercise book, which can help students consolidate what they have learned in this class. The price of this book is 16 yuan, which is very cost-effective, and the students have a high evaluation of this book. It is a workbook that can really help students learn.