A module for computer science lessons that will help middle school students master the skills of data analysis and working in MS Excel. During the module, students will learn why everyone is talking about big data, understand the basic concepts of descriptive statistics, learn to analyze data and visualize the results. The module consists of 8 lessons. Each lesson is accompanied by a lesson map with all the information necessary for the teacher, as well as all the necessary additional materials: presentation, assignments for students and correct answers for checking them.