The presented paper is devoted to finding out and analyzing the opinions of primary education teachers on the causes of the unsuccessful adaptation of current schoolchildren to the beginning of systematic education. To find out the above issues, pedagogical research was carried out at selected primary schools in Slovakia. The implementation of the research and the subsequent analysis of the research results confirmed that the length of teachers' pedagogical practice has a statistically significant effect on their views on the causes of adaptation difficulties in emotional, social, intellectual, and psychomotor areas of children's school readiness.
Keywords: adaptation difficulties; beginning of schooling; pupils; teachers.