This report by the Education Policy Institute assesses the impact of headteachers on school performance in England, and the mechanisms through which headteachers influence performance. In addition, the study explores whether a headteacher’s gender and ethnicity have an impact on the composition of the pupil and staff bodies, and on the attainment of specific demographic groups.
It claims that replacing an ineffective headteacher (identified as being in the 16th percentile) with an effective headteacher (in the 84th percentile) increases pupil attainment by an average of two GCSE grades across all subjects.
Even replacing an ineffective headteacher (identified in the 16th percentile) with one of average quality can still deliver improvements, equivalent to an increase of one grade in one GCSE subject.
Given an extra grade is estimated to add £8,000 to the pupil’s lifetime earnings, in an average secondary school of 1,000 pupils, recruiting an effective headteacher instead of an ineffective headteacher and retaining them in post for five years, could result in an extra £16 million in lifetime earnings for those pupils.
Primary schools that switch from an ineffective to a more effective headteacher were found to gain an additional three months of learning for pupils.