Success for All (SFA)[R] is a whole-school reform model that includes a reading, writing, and oral language development program for students in prekindergarten through eighth grade. Classroom reading instruction is delivered in daily 90-minute blocks to students grouped by reading ability. Immediate intervention with tutors who are certified teachers is given each day to those students who are having difficulty reading at the same level as their classmates. This intervention report focuses on the reading component of SFA[R], which is often implemented in the context of the SFA[R] whole-school reform program. Although the whole-school reform program has key components that are implemented in each school, school sites may vary considerably in the number of personnel used to implement SFA[R], particularly tutors and family support staff. The reading curricula are essentially the same at all schools, with each school receiving the same training, coaching support, and materials. Ratings presented in this report are not disaggregated by the variations in implementation of wholeschool reforms. The What Works Clearinghouse (WWC) reviewed 110 studies on Success for All[R]. One of these studies meets WWC evidence standards; six studies meet WWC evidence standards with reservations; the remaining 103 studies do not meet either WWC evidence standards or eligibility screens. Based on the seven studies, the WWC found positive effects in the alphabetics domain, potentially positive effects in the general reading achievement domain, and mixed effects in the comprehension domain. The conclusions presented in this report may change as new research emerges. Six appendices are included: (1) Study characteristics; (2) Outcome measures by construct within domain; (3) Summary of findings by domain; (4) Summaries of earlier findings and subgroup findings by domain; (5) Ratings by domain; and (6) Extent of evidence by domain. (Contains 12 footnotes.) [For earlier report, see ED497839. The following report meeting WWC evauation standards is reviewed in this intervention report: Borman, G. D., Slavin, R. E., Cheung, A., Chamberlain, A., Madden, N., & Chambers, B. (2006). "Final reading outcomes of the national randomized field trial of Success for All." Retrieved from Success for All website: ttp://www.successforall. net/_images/pdfs/Third_Year_Results_06.doc.