Unplugged Computer Science"-The teaching activities in the book are lively and interesting. For middle school students, it is more in line with the existing knowledge and experience, and is more suitable for cultivating their various abilities. In this book, the author not only designed games suitable for learning knowledge points, but also designed appropriate questions and exercises for the game to test and evaluate the effect of students' learning. In teaching, students can solve some real-life problems based on the knowledge points they have learned, and they can also conduct group discussions and collaborate to solve problems. For the learning of complex concepts, this kind of game design is easier to understand than the teacher's simple explanation. The students' cooperative communication skills, problem-solving skills, knowledge construction skills and practical innovation skills have been cultivated and improved. Through studying this book, I have a deeper understanding of optimizing teaching design, enriching classroom activities, and then improving the efficiency of students' autonomous learning.