The analysis of the literary text related to the activity of educational research aimed at the effectiveness of the intellectual development of the person serves to increase the logical and creative ability, free thinking, activity and independence of students, in a word, cognitive activity. Conducting small research develops children's logical thinking, the ability to calmly solve wrong situations in the process of finding a reasonable answer, and the ability to have an impartial attitude to the problem. As a result, students develop the skills of being attentive to the issue, accuracy, objective assessment of events in complex situations, and creativity. The article talks about these aspects.