At the request of the Accountability Review Council, Research for Action identified effective organizational practices used by better performing schools serving substantial numbers of low income middle and high school students in the School District of Philadelphia. These practices are organized into three spheres: Conditions for Teaching, Student-Centered School Community, and Instructional Program. For each sphere, the report offers broad strategies and specific practices to enact the strategies. Nuanced school case studies show how the practices can work synergistically and coherently in schools to help students succeed. Three appendices are included: (1) Selection process and school profiles for sample schools; (2) Teacher Leader Time; and (3) Recent studies that provide context to our findings. (Contains 9 tables, 1 figure and 16 footnotes.) [This report was prepared for the Accountability Review Council by Research for Action.]