Abstract
The aim of the study was to determine the conditions for the improving of combinatorial actions in children of 9 years old (3rd grade 9 years old elementary school students). The original «Combination-2» educational program may become a condition for improving combinatorial actions. It was supposed to establish such conditions. The program includes 30 types of non-standard tasks with extracurricular content. Each type of task had three structural versions of the tasks: find the answer, find the question, and find part of the initial conditions. Solving these problems requires combinatorial actions. The control group consisted of 91 children, the experimental group — of 96. These children participated in 30 group classes for 30 weeks (weekly, from September to May). The study showed that the “Combination-2” lessons contribute to the improving of combinatorial actions in children. In further studies, it is planned to determine the extent to which the “Combination-2” program contributes to the improving of combinatorial actions in children of 10 years old.

Key words: Combinatorial actions, 9 years old children, program "Combination-2"