This comprehensive guide explores Problem-Based Learning (PBL), an innovative approach to leadership training. PBL has been adapted from its original use in medical school training into a tool for administrator preparation. In PBL, a real-life scenario with an open-ended problem or question for which there is no single right solution is presented. Teams of participants work together to develop a solution. This guide explains PBL and contains resources to help urban school leaders develop through PBL. Chapter 1, "Urban Leadership Development: Five Core Competencies" by Lynn Stinnette, Robin LaSota, and Robin Fleming identifies competencies critical for school leadership. Chapter 2, "Using Problem-Based Learning in the Professional Development of Urban School Principals: Curricular and Classroom Issues" by Philip Hallinger and Edwin M. Bridges, describes a PBL training session for urban principals. Chapter 3,"The NCREL Experience: Lessons Learned and Recommendations" by Robin LaSota, Ann Freel, and Mark Hawkes, describes a pilot use of the PBL project. Chapter 4, "PBL Projects and Selected Resources," contains the following resources: (1) "Did You Make the Team?" (Bill Andrekopoulos); (2) "The Disgruntled Counselor" (Rogers Onick and Philip Hallinger); (3) "Leadership in the Urban High School: Meeting the Challenges of the 21st Century" (Clark Lovell); (4) "Spare the Rod" (Deborah Bell); (5) "For the Children's Sake: Collaborate!" (Yvonne Hopgood); and (6) "Save Our School" (Helen Harris). Each section contains key resources, and an appendix contains training institute agendas, sample overheads, and PBL problems. (SLD)