Education, as known, is the foundation on which a strong and healthy government is built and maintained. In elementary school, the foundation of the system of knowledge is laid, which is replenished during all educational activities. At the same time, many younger students poorly learn the program material, which leads to failure in subsequent studies. There are also students who, receiving satisfactory grades, could study better. Therefore, difficulties that appear in children in primary classes prevent them from mastering the compulsory school curriculum. The important task of the teacher is to provide timely help to avoid difficulties in education. For this, it is necessary to know their causes in the educational activity, the ability of the teacher to establish which of them are effective in a specific case with the help of diagnostics, to be able to eliminate them in time or correct the consequences. Thus, timely corrective work aimed at improving the performance of younger schoolchildren is necessary.Today, the organization of correctional work to improve the performance of younger schoolchildren is one of the most pressing problems of modern schools. The study of the features of correctional work aimed at improving the performance of younger schoolchildren will contribute to increasing the efficiency of the educational process. Purpose of the article is increasing the effectiveness of correctional work of underachieving students in primary classes. Descriptive method, methods of systematization, analysis and interpretation, synthesis were used during the research. The problem of school failure is very complex, its research involves many different approaches, but all of them are grouped around two main aspects of the problem: how the teacher teaches, how the student learns and how their development is carried out. Recommendations on the construction of correctional work taking into account its features in primary school will help to increase the efficiency of the educational process and reduce the level of failure in the primary level of secondary general education school.