Introduction to Case-making and Systems Change in Arts & Cultural Education is an overview of a collaborative project between Creative Generation and ElevateArtsEd undertaken to better understand how practitioners - such as artists, educators, community leaders, and more - can make the case for and also advocate through arts and culture to drive systemic change and address complex challenges. The project seeks to expand the knowledge base of case-making and systems change in the field of arts and cultural education and provide resources to support effective actions for practitioners and young creatives. Investigating both the theory and the practice of case-making, the introductory article draws on research from three distinct sectors: cultural, education, and social justice. The approach represents both the science of advocacy - building blocks for understanding what effective advocacy looks like - and the art of advocacy with calls for improvisation, adaptability, and generative thinking, all characteristics of art making. The article describes six key learning themes and an expanded model for advocacy focused on self, field, and sector through an overarching lens of social justice.