Conducted a data quality substudy in conjunction with the School Health Policies and Programs Study (SHPPS) 2000 to assess the quality of study questionnaires. Validity of state and district level questionnaires was examined via telephone interviews with original respondents. A test-retest reliability of the school and classroom level questionnaires was conducted through computer-assisted repeat interviews with original respondents. Overall, the SHPPS data were of high quality. (SM)