This article is devoted to one of the research priorities - educational stress in high school students and its connection with academic performance. In the theoretical part of the article, a detailed review of the results of studies of educational stress in domestic and foreign psychology is given. The empirical part of the sample of 197 high school students, of which 100 boys and 97 girls, describes manifestations of educational stress in detail: its levels, levels of stress tolerance and suicidal risk, indicators of resilience. As a result of a comparative analysis between boys and girls, the following differences were revealed: girls have a higher level of achievement; girls are more stress resistant than boys; while young men have a higher level of resilience. As a result of the correlation analysis, data were obtained on almost all scales, proving the hypothesis that there is a direct relationship between the level of academic stress and the level of academic performance in high school students.