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The textbook is based on the Model Educational Programme developed under the guidance of O. Savchenko.

The textbook contains elementary theoretical information; visual supports in the form of memos, diagrams, samples of reasoning; systems of tasks for updating basic knowledge, creating a problem situation and its solution, primary consolidation, formation of skills, continuous repetition. The author's methodological system, implemented in the textbook, is aimed at developing students' skills in counting and arithmetic calculations, the ability to work with mathematical problems, geometric and logical tasks.

The textbook is accompanied by online support on the website: test tasks, training presentations, videos to illustrate the plot tasks.

The textbook is intended for pupils of the 3rd grade of general secondary education institutions, primary school teachers.