The subject of the bachelor work is school maturity among preschoolers who start the first grade of primary schools. In the theoretical part I describe what the school maturity is, what it consists of, how it is tested and what effect this testing has for further development of the individual. Testing of the school maturity of children in kindergartens is carried out with screening. This testing is provided in kindergartens by external child psychologists from pedagogical-psychological counseling, and it is completely voluntary. However, preschoolers go through another type of testing of the school maturity within an enrollment in the first grade of primary schools. In this case, the testing is compulsory. The aim of the practical part of t...