This report details five principles for creating powerful classrooms and offers a new vision for professional development: (1) High Structure; (2) High Challenge; (3) Intensity; (4) Intentionality and Learning How to Learn; and (5) Inquiry and Making Learning Visible. Included are recommendations drawn from the work of the 11 community college campuses that participated in Strengthening Pre-Collegiate Education in Community Colleges (SPECC): (1) The success of underprepared students must be an institution-wide, core responsibility; (2) Professional development should be reinvented as an intellectually engaging, integral element of work in an educational institution; (3) Institutional research must be expanded to focus more directly on core issues of teaching and learning; (4) Community colleges should lead the way in developing richer, more revealing measures of student learning; and (5) Ongoing, larger-scale improvement requires a lively, open "teaching commons" that values the knowledge of practice.