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"
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