I am a researcher, former teacher, and policy advisor with nearly two decades of experience spanning classrooms and national education systems. I study how education systems improve teaching and learning in resource-constrained settings. My research asks three connected questions: What improves student learning? How and under what conditions does change occur? What enables effective approaches to endure and scale? I examine these questions across education systems, schools, classrooms, and children’s home environments, using experimental and quasi-experimental methods alongside observational and qualitative research. I work with ministries of education, universities, philanthropic foundations, international organizations, and non-profit organizations to generate evidence and translate it into policy and practice. Underlying this work is a belief that education can widen what is possible, especially for children whose futures depend most on whether systems deliver.