Stepwise regression was used in 1986 and 1987 to determine the best predictor variables for predicting the percentage of students in the 113 Atlanta Public Schools scoring at or above the national norm in reading and mathematics on the Iowa Tests of Basic Skills/Tests of Achievement and Proficiency. Twenty elementary school, 16 middle school, and 16 high school variables were identified. While socioeconomic status was the best predictor for elementary school students in 1986, the grade 1 mean scale score on the Georgia Criterion-Referenced Tests (GCRT) was the best predictor for elementary students in 1987. In middle school, the GCRT score of grade 8 was the best predictor in 1986, with socioeconomic status the best predictor for 1987. Socioeconomic status was the best predictor for high school students for both years in reading and for mathematics in 1987. The percentage passing the GCRT was the best predictor for mathematics in 1986. Although socioeconomic status is not a good predictor of individual achievement, it is a strong predictor of school achievement levels. Seven tables present test data. (SLD)