Describes a method with data analyzed from two lessons on the quantitative assessment of content structure in classroom dialogue. Kinetic structure analysis was used and the fundamental coefficient of structure was calculated for each lesson. The method should provide new directions for looking at verbal interaction in classrooms. (PS)

Discusses the number of observations necessary to obtain a trustworthy sample of classroom transactions by reanalyzing existing data. Eleven to twenty observations appear necessary for teachers' questions which require students to hypothesize. The reliability of a single observation was zero for four other questioning types. (CC)