The article focuses on the empirical research on the relationship between the results of the individual academic achievements monitoring of the 9th grade students of Voronezh region general education establishments in Mathematics, Physics and Chemistry at the level of basic general education. It indicates and describes the stages, content, conditions and procedure of conducting the empirical study. While conducting the empirical study, in order to assess the correlation between the results of the monitoring of the 9th grade students' individual academic achievements in Mathematics, Physics and Chemistry at the level of basic general education, the following statistical methods were applied: correlation and regression analysis and one-way analysis of variance. These methods jointly allow identifying the internal connections and patterns of correlation between the results of the monitoring of the 9th grade students' individual academic achievements in Mathematics, Physics and Chemistry at the level of basic general education.