To assess structural coupling in schools, investigators must first have measures with established reliability and validity levels. Structural coupling refers to the mechanisms and norms in organizations that influence interactions among individuals. For three structural coupling measurement techniques--participant observation, interviews, and surveys--the study estimated content, construct, convergent, and predictive validity levels and test-retest and internal consistency reliability levels. Interview and participant observation data were gathered at a junior high and a high school in one Kansas school district. Survey data came from 145 teachers and administrators in 67 schools in 48 Kansas school districts. The structural coupling measures demonstrated excellent psychometric characteristics. The correlation coefficients for the construct and convergent validity estimates were high with few exceptions. The predictive validity estimates add further evidence that the measures were efficacious. (Author/RW)