Describes the results of comparative study of Russian elementary students' learning of spelling under an experimental didactic system and under traditional methods. Findings confirmed the hypothesis that sophistication in spelling depends on the overall development of pupils. (Author/RM)

This experiment on teacher effectiveness focuses on the causal effects of teacher behavior within the classroom recitation. Each of four teachers used one of eight treatments in teaching an ecology course to eight sixth-grade groups. The treatments differed at two levels of teacher structuring, soliciting, and reacting. High structuring consisted…