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Methodology of Studying the Problem of Underperformance of Children of Preschool and Primary School Age in Germany

Based on the study of K. Bart’s “Early Diagnostics of Underperformance in Schooling at Preschool and Primary School Age” involving similar works by other German specialists of different profiles, the article analyzes the reasons for academic failure, repetition, learning difficulties and adaptation of children to school in Germany. Special attention is paid to the methodology of studying this phenomenon and approaches to its elimination. The urgency of the problem of failure of schoolchildren is accentuated not only in relation to the educational system in Germany, but also in other countries, including Russia. The comments of experts in the field of international comparative studies of student performance are given.