Over the past twenty years, youth organizing has grown across the country. Through organizing, young people identify issues of concern and mobilize their peers to build action campaigns to achieve their objectives. Youth organizing has been appreciated for its contributions to youth and community development. The authors use two case studies to trace the more recent emergence of youth organizing as an important force for school reform. The Boston-based Hyde Square Task Force began with a focus on afterschool programming, but its youth leaders now organize to get Boston Public Schools to adopt a curriculum addressing sexual harassment. Meanwhile, the Baltimore Algebra Project began as a peer-to-peer tutoring program, but now also organizes to demand greater funding for Baltimore schools. These cases illustrate a broader phenomenon where students reverse the deficit paradigm by acting out of their own self-interest to become agents of institutional change. (Contains 31 notes.)