The consequences of using alternative measures of time and achievement are examined in an observational study of 18 elementary school classes. The extent to which choice of the same model linking time and learning for all students was implicated in the inconsistent results is examined. (Author/GK)

Reading instruction and its effects were examined for 105 students in elementary classrooms for the learning disabled. Extensive detailed observations of students, teachers, and instructional material were used to explore the plausibility of a causal model of the effects of reading behaviors and instruction on students' reading performance.…