To address educational reform needs in New York State, the State Education Department developed a research-based Sharing Successful Practices (SSP) Dissemination model. Under SSP, a program successful in meeting one district's needs can be adopted by other districts with similar needs. SSP has four components: validation, demonstration, replication, and technical assistance. An evaluation of SSP must consider model characteristics as well as what happens after the model is implemented. In the report, several studies conducted over a period of years are synthesized to demonstrate that SSP is an effective tool in bringing about educational change. The report specifically shows that SSP has content and construct validity; is reliable and cost-effective; is more efficient than developing a local program; and is perceived as useful by local school districts. In addition, local school district evaluation data indicate that replicating validated programs is successful. Participation rates are high, with over 85 percent of the school districts participating in replication during the 12-year period. More than 12,000 adoptions have taken place, with a large number happening in urban schools. Five tables and 16 references are included. (MLH)