The main purpose of this study was to investigate the relationship between adolescent computer use and academic achievement. Questionnaires and seven-day time logs were used to gather data from 101 tenth-grade students in southwestern Ohio. The adolescents both estimated and documented their computer use. The correlation between computer use and grade point average was not found to be significant. However, gender differences were found across grade point average and time spent doing homework on and off the computer. Estimates of time spent per week using the computer were correlated with the time recorded in logs.