Two quantitative measures of school performance are currently used, the average points score (APS) at Key Stage 2 and value-added (VA), which measures the rate of academic improvement between Key Stage 1 and 2. These figures are used by parents and the Office for Standards in Education to make judgements and comparisons. However, simple statistical analysis suggests that the measures are correlated and, therefore, schools with high APS values have high VA. This calls into question whether the measures are objective and valuable as a means of assessing a school's efficacy.