This document addresses itself to three aspects of the Follow Through Classroom Observation Study: (1) the extent of implementation in the classroom, (2) the relationship of training and teacher characteristics to classroom implementation, and (3) the relationship of student outcome to classroom implementation and program characteristics. The sections on sponsor implementation provide convincing evidence that teachers are conforming to sponsor specifications. There is little deviation between classrooms on implementation variables, and, except for one sponsor, Educational Development Center, the models differe statistically from non-Follow Through. Follow Through teachers have both the understanding of the model, since each sponsor's group of teachers described their own classrooms quite consistently on the structure/flexibility scale, and the ability to implement the model as proven by the systematic observations. The children's test scores are also reported. (BB)