This research abstract is based on the study, "Educational Teaching: An Approach to Improving Student Achievement, Changing Teaching Beliefs, and Identifying Effective Practices" by Stanley L. Deno. The abstract describes a 2-year study of the effects of combining curriculum-based measurement with the use of alternative teaching strategies, to determine which reforms in the student's educational program produce the best performance outcomes. Six resource specialists were selected as teacher trainers for 28 experienced, volunteer special education resource teachers working with elementary students with mild disabilities. The study found that, following the experience of experimental teaching, teachers generated more alternative interventions in response to a specific case and reduced their estimates of the proportion of students for whom a given intervention would be effective. Results indicated that the combined effects of training and experience in experimental teaching provided teachers with a greater overall knowledge of teaching interventions, changed their beliefs about individualized instruction, and allowed them to select more effective interventions for their students. (JDD)