The proposed manual contains material that covers the entire 2nd grade math course. By studying just 10 minutes a day, a little student can become a "math prodigy" in the eyes of teachers and classmates. Bright pictures, visualization of tasks, extensive reference information, and an original reward system make the lessons highly effective. The simulator has three modes of operation: "Study", "Self-check" and "Knowledge Control", which allows you to objectively assess the success of the schoolchild in mastering the selected topic (the assessment is made by the computer). The simulator is designed with due regard for the age characteristics of elementary school students and compliance with sanitary requirements when working on a computer. Changing the size of the simulator's working field allows it to be used both on a regular computer for individual learning and in the classroom when using an electronic interactive whiteboard.