This article describes the feature of self-assessment that affects the success of students' learning. Educational activity is the main factor influencing the formation of self-esteem of younger students and this is the leading activity in which personal results appear. This article tests the hypothesis of a relationship between self-esteem and learning activities. To establish the reasons for the success or failure of learning, due to the characteristics of the student's personality, it is necessary to identify which complex of personality properties mainly determines the success and failure of learning. Self-esteem, as a psychological category, is understood as a process of correlation of a developing personality with real results and activities.