The COVID-19 pandemic has likely changed the mathematics, health and environmental education research landscape in profound and long-lasting ways. As such, more than ever, there is a need to creatively and critically think about how we design research and for what purposes. This necessitates a considered and robust discussion about educational research theory, method, and methodology to ensure that our research continues to impact practice in valuable ways. This book maps out some of these key challenges and opportunities as we collectively enter a post-COVID-19 world in which method and methodology need to be appreciated as much as research findings. Topics explored here range from big-picture issues in STEM Education research, through perspectives on design-based research, to questions of analysis, complexity, the Delphi method, and ethical dilemmas.