Class Size and Teacher Quality

The `Vinson Report' on Public Education in NSW has become received wisdom. The report's recommendation on class sizes has attracted more attention than any other. This is unfortunate because it is on this issue that the Report is weakest. A thorough appraisal of the research on class sizes reveals that many studies have methodological problems that make their application in a real world context doubtful; many studies have introduced other reforms such as curriculum changes at the same time as class size reduction, making their individual effects impossible to determine; the large majority of studies have found no significant effects of class size on student achievement, while the remainder have shown small benefits, usually only when classes have less than 20 students; class size has less effect when teachers are competent; and the single most important influence on student achievement is teacher quality. Research shows unequivocally that it is far more valuable, both in educational and fiscal terms, to have good teachers than lots of teachers. It must be ensured that the current and incoming teaching force is the best it can be, before seeking to expand it.Key Words: child development, class size, public education, student achievement, teacher quality, teaching methods