This Technical Research Report gives correlations between student scores on the General Technical (GT) composite of the Armed Services Vocational Aptitude Battery and cumulative grade point averages (GPAs). Data were collected on 911 juniors and seniors selected from a sample at 22 secondary schools in the San Antonio metropolitan area. The GT score was found to significantly relate to overall academic performance for 19 out of the 22 samples, with a median rho of 44. Results indicate that the level of relationship was not differentially affected by school-specific ethnic group composition, school expenditures or average teacher/pupil ratio. Neither the samples used nor conclusions presented in this study should be construed as representative of high schools throughout the country. Since socio-economic levels represented in the various samples go from the highest to the lowest ranges, limited generalizations may be meaningful to other school districts with similar diverse populations. This is an initial report exploring the relationship between student performance on various ASVAB scales and various criteria in the civilian academic sector. Additional studies will further assess relationships across various grade levels, in differing types of training situations, and across different time spans. As such, this first study should be interpreted as a prelude to additional and more comprehensive analyses of the Armed Services Vocational Aptitude Battery. (Author)