RTI has the potential to meet the challenges of increasing diversity in student populations and the need for increasingly complex systems of instructional design. Three fundamental shifts in understanding systems and systems change must ground RTI policy and implementation work. First, RTI must be seen as an activity system nested within a larger…

The author, the 1996 winner of the Council for Exceptional Children Research Award, reviews trends in research and changes in special education over the past 25 years. Emphasis is on the continued need for research on learning disabilities and ways to ensure that research findings are translated into practice. (DB)

Varying levels of inservice training and support in use of classwide peer tutoring (CWPT) were provided for 44 elementary teachers whose classes included students with learning disabilities. Analysis of teachers' survey responses, teachers' classroom observations, and interviews of six implementors indicated that level of support did not…