Systematic overview of education supply and effects of education for arithmetic. ideological base of school * used methods for arithmetic education * detailed account of apprenticeship and education supply in several classes * number of pupils of the school * part of promoting education area * permanent functions * detailed account of the organization structure within school * participation of parents * reference procedures * education and behaviour problems of pupils * meaning of teachers about the level of arithmetic of their pupils * arithmetic ability for classes 3, 4 and 5: numbers, count up, subtract, multiply, divide, measuring and measurements, calendar and clock, money * arithmetic ability for classes 6, 7 and 8: integers, fractions, mental arithmetic, calculations, percentages, relations, measuring, calendar and clock, money Background variables: basic characteristics/ residence/ education