The development of information technologies, their availability for every family, the transition to distance learning could not but affect health status of schoolchildren. In the past year, amid the spread of the new coronavirus infection, the time that schoolchildren spend with gadgets has significantly increased. The relevance of this study is determined by the evaluation of the ever-increasing and, as a rule, negative impact of computer technologies on the health of schoolchildren. The study aimed to investigate the features of the effect information technologies have on the well-being of high school students and to analyze the role teachers play in popularization of healthy lifestyle and reduction of the degree of influence of information technologies on health of modern schoolchildren.