Buck Institute for Education
One of the best-known organizations for developing and promoting Project-Based Learning. Site contains lots of documents, rubrics, planning forms, student handouts, etc. "At the Buck Institute for Education (BIE), our highest priority is to help teachers prepare students for successful lives. We do this by showing teachers how to use Project Based Learning in all grade levels and subject areas. As a mission-driven nonprofit organization, BIE creates, gathers, and shares high-quality PBL instructional practices and products and provides highly effective services to teachers, schools, and districts."