[Some factors influencing performance at school of Czech children (author's transl)]

In the 1971 survey 29,682 boys and 30,464 girls in the Czech region of CSSR had been measured and investigated otherwise. The average of their school marks is taken as a measure of performance (success) at school. Interrelations between this value and the education resp. profession of the parents, number of inhabitants in their residence, number of siblings, laterality a. s. o. are analyzed. It seems, that children were as better successfull in the school, as better had been the education of their parents, and as fewer are their siblings. Concerning the quality of the school report, the activity of the mother is more important than the activity of the father.