Recent emphasis on raising attainment has focused attention onto the 'gender gap' in school attainment levels. Using data from the Scottish School Leavers Survey, the article examines factors related to high attainment and asks whether these differ for males and females. A strong relationship is established between social advantage and high attainment within each gender. There is no evidence of differential progression rates for males and females between the ages of 16 and 18. The only factor which offers any explanation for gender differences in attainment is the evidence that girls took school more seriously than boys. This supports theories that girls and boys experience different peer pressures which influence their school attainment. Other factors have also been shown to influence gender differences in performance in the research literature. Factors affecting gender differences were found equally in all schools, suggesting that wider cultural factors are also influential in creating gender differences.'catch up later ' (Tinklin et al., 2001). Multilevel modelling is used as this allows an assessment of the relationships between different factors and high attainment, as well as an assessment of the variation between schools in their ability to produce high attainers when other factors are held constant.Concern over the 'underachievement of boys' is a fairly recent phenomenon, which has been brought into focus in Scotland by the emphasis on raising attainment in schools. Government policy documents related to Raising Standards-setting targets (Scottish Office, 1998) and Targeting Excellence-modernising Scotland's schools (Scottish Office, 1999) were the first of their kind to raise the issue of gender differences in attainment directly. The latter states:Although the performance of boys and girls is improving, that of girls continues to surpass that of boys. We must ensure that this differential is narrowed. If standards are to be improved and schools are to reach their targets, the attainment of boys must be brought more into line with that of girls. (Scottish Office, 1999, chapter 2, para. 22)