The purpose of this paper is to compare measures of socio-economic status (Index of Community Socio-educational Advantage values (ICSEA)), school performance, school funding and school readiness in terms of their impact on student performance. In this respect, the paper tests the proposition – given research that suggests the teacher is the important ingredient in improved student learning performance – that a school principal who has strategical worked to “ready” their teachers for a whole of school teaching improvement agenda will generate increased student learning results than those who have not and further this improvement will occur irrespective of the circumstance of the socio-economic circumstance of the school.