A multiyear effort to understand and improve the practice of learning communities across North America has revealed encouraging trends and areas in which work should continue. The authors asked fifty-six educators involved in the work to write and talk about the state of learning communities. The authors wanted to learn how learning community programs might become more effective and more sustainable over time. This article synthesizes their perspectives on this creative yet demanding approach to education reform. It presents and discusses 15 lessons about learning communities. These are: (1) Learning communities have arrived as a national movement; (2) Learning communities have taken hold because they are flexible; (3) Learning communities have become locations for faculty, staff, and student development; (4) Learning communities have become important seedbeds for pedagogical innovation; (5) Learning communities have built strong links between disciplines and divisions; (6) Learning community assessment is good but not yet great; (7) The need to offer low-cost learning communities or demonstrate cost-effectiveness of more expensive programs will increase; (8) Sustainability entails vigilance about logistical considerations; (9) Sustainable learning communities require a larger vision; (10) Successful learning communities depend on leaders drawn from across campus; (11) Successful learning communities invest in faculty and staff development; (12) Sustainability requires continual rethinking and reinvention; (13) Educators must be willing to change as they ask students to change; (14) The emotional side of change matters; and (15) Change agents need the perspective and support of allies and mentors.