The Teaching Situation Reaction Test (TSRT), a measure of secondary school teachers' effectiveness, was adapted to the intermediate elementary grades. The TSRT (Elementary Form) was administered to 210 volunteer teachers in the fourth, fifth, and sixth grades in Dayton, Ohio during January 1969. Two groups of teachers were formed for in-depth study--those scoring in the top 27 percent (High Group) and the bottom 27 percent (Low Group) of the 180 teachers providing useable response sets. Each group contained 48 teachers. Teachers in the High Group were compared with teachers in the Low Group on 25 factors in four categories: personal, classroom, school environment, and performance. A one-way analysis of variance was made by computer, comparing the means of the two groups of teachers on all 25 factors. The F-test was applied to determine significant differences. Results indicated that teachers scoring high on the TRST and teachers scoring low represent different samples of the population. Further conclusions are indicated. (A 9-item bibliography and related research material are included.) (Author/MJM)