Principals as STEM Leaders – Building the Evidence Base for Improved STEM Learning (PASL) is funded by the Australian Government Department of Education and Training, and responds to the need for a science, technology, engineering and mathematics (STEM) skilled workforce to ensure Australia remains globally competitive. PASL will support principals to effectively drive whole-of-school collaborative effort in STEM engagement and STEM teaching and learning for STEM capability. This will involve participation in professional learning programs and engagement with tailored mentoring programs.