This article discusses the impact of a professional learning activity called the Principals as Literacy Leaders (PALL) program on the strategies used by primary school leaders to support teacher professional learning with the view of assisting students to become more able readers. It uses data collected from participants in the PALL program, together with case study data collected from school leaders and teachers in seven schools, to analyze the actions taken by school leaders to improve teaching practices through professional learning. The study showed that school leaders felt more capable in their ability to lead their schools after completing the PALL program and that strategic professional learning activity led to improved teaching practices and higher levels of student engagement and achievement in reading. It showed that leaders used elements of the Leadership for Learning approach as key activities for supporting professional learning.