Improving educational performance, including narrowing equity gaps, is frequently touted as a matter of improving the quality of teachers in the lowest performing, often disadvantaged, schools. However, the assumption that teaching is of poorer quality in disadvantaged schools is largely unsubstantiated. Using the Quality Teaching Model of pedagogy, we observed 832 lessons in 193 New South Wales primary schools and found a small relationship between teaching quality and school-level advantage. However, when 174 teachers from across the school spectrum participated in Quality Teaching Rounds we found equivalent, and substantial, gains in teaching quality across all levels of school advantage. This result indicates that differences in teaching quality are less a reflection of teacher capabilities than of the challenging circumstances in disadvantaged schools. We argue that policies seeking more equitable achievement should address wider social inequities, rather than unfairly blaming teachers for being unable to level an unequal playing field.