Wertsch's clarification of Vygotsky's claims about the role of social interaction in the development of children's thinking made an important contribution to educational research. Revisiting that clarification, I suggest that "talk" instead of "speech" best describes Vygotsky's concern with the functional dynamics of dialogue rather than the…

Suggests the small school provides an excellent environment for successful mainstreaming and that the principal can provide intervention and leadership for professionals, which leads to interaction with each other and on behalf of the special students. Discusses team teaching, the principal as a model, and shared leadership. (AH)

A study of instructional change in three schools reveals that a change strategy should take advantage of existing communication networks. Where there is little interdependence among teachers, administrators need to encourage its growth and replace the egg crate form of organization with arrangements that increase teacher interaction. (MLF)