This document is the final report of the Interactive Research and Development on Teaching (IR&DT) study on the implementation of educational research in actual site locations. Two teams of teachers, researchers, and trainer/developers spent fifteen-and-one-half months implementing the IR&DT at two sites in Vermont and California. Their efforts form the basis of this report. Included are: 1) a discussion of the essential features and assumption of the IR&DT strategy; 2) a description of the strategy implementation at each research site; 3) description of the study participants; 4) discussion of the purposes and procedures of IR&DT; 5) evaluation of the study outcomes; 6) discussion of the use of IR&DT as an intervention method, with conclusions regarding the study and suggestions for future programs and research. Tabular presentation of the information resulting from this research is also presented. (LH)