Robotics is becoming a part of our life. The more we live, the more sophisticated it becomes. Great scientists design robots that replace people in hazardous situations, help them in everyday life and even become a part of their bodies. It is from Universities that these great scientists graduate. And they all came to Universities from schools, where they were taught. It is a pity, but now robotics at schools uses the same terms as robotics at Universities, but their methods are different. Every school student has to understand some other principles of working with the same things compared to when their University studies. So the aim of the report is to make a research that connects robotics at school and robotics at Universities. The report is about the use of control theory for the task of calculating coefficients of controllers for mobile LEGO robots. The aim of the report is to teach children some classic methods of tuning of controllers during robotics classes. One of the basic tasks at robotics classes at school is to make a robot move down the line. Using one or more light sensors it has to move down the specified line as quickly as possible. Pupils use relay, proportional, proportional-differential controllers to meet the task, but they determine their coefficients by trial and error. There is no specified methodology for this purpose now. Some methods to calculate the coefficients and some types of controllers and their practical implementation are described in this report. As a result of the survey, various experiments about implementation of controllers were made and their results were analyzed.