The present study investigated the relationship among middle school students' self-perceived locus of control, their school achievement, and their school attendance. A cohort of 265 seventh-grade students was administered the children's version of the Multidimensional Health Locus of Control (MHLC-C) scales, which measure health locus of control across three identified subscales: powerful others, change, and internal. California Achievement Test (CAT) composite subscale scores were compiled for these same students, as was a record of the days present during the previous school year. One canonical function was interpreted which indicated the existence of a moderate relationship among the variables. Analysis of variable weights indicated that the function largely capitalized on the relationship between the MHLC-C subscales and the CAT subscales, with the attendance variable contributing little to the results. Implications of the findings as they relate to educational practice are offered. Five tables are included. (Contains 29 references.) (Author)