This article considers a number of issues related to the effective training of teachers in the use of mobile technologies in the educational process at the current stage of development of the local education system. Before starting the conversation about the main topic, it is shown that the widespread introduction of mobile technologies is one of the most important conditions that help to further modernize the educational process. In addition, the importance of developing appropriate competencies in the teacher in terms of more effective integration of relevant technologies into the educational process is shown. For many teachers, characteristic deficiencies in their development are demonstrated. Necessary measures are determined to eliminate these shortcomings. In order to increase the effectiveness of the development of relevant competences, possible methods of modernization of the existing additional education system of teachers are proposed.