The study, a seventh in a series of longitudinal studies, was an investigation of causal and other relationships among leadership, climate, teacher, and student variables in curriculum engineering. Quantitative measures included principals' leadership, organizational climate, teachers' attitudes, teachers' performance, and students' achievement. Additional teacher and student variables were used as control variables. A causal model showing block-recursive and reciprocal relationships was used to demonstrate linkages among variables. The significance of regression coefficients and the proportion of variance accounted for in the effects supported the assumptions of causal relationships among the four classes of variables. (Author)