There have been few, if any, attempts to translate the immense library of academic studies on gender norms for a lay audience, or to illustrate practical ways how their insights could (and should) be applied. Similarly, there have been few attempts to build the case for gender in diverse fields like health, education, and economic security within a single book, one which also uses an intersectional lens to address issues of race and class. This book not only looks at the impact of rigid gender norms on young people who internalize them, but also showing how health, educational, and criminal justice systems with which young people interact are also highly gendered systems that relentlessly police and sustain very narrow ideas of masculinity and femininity, particularly among youth. Current treatments of a "gender lens" or "gender analysis" both at home and abroad usually conflate gender with women and/or trans. This book shows conclusively how this is both inadequate and wrong-headed. It documents why gender norms must be moved to the center of the discourses aimed at improving life outcomes for at-risk communities. And it does so while acknowledging the insights of queer theorists about bodies, power, and difference. This book provides a starting point for a long overdue movement to elevate "applied gender studies," providing both a reference and guide for researchers, students, policymakers, funders, non-profit leaders, and grassroots advocates. This book aims to transform readers' view of a broad array familiar social problems, such as basic wellness and reproductive health; education; economic security; and partner, male-on-male, and school violence—showing how gender norms are an integral if overlooked key to understanding each.