Several studies provide preliminary evidence that computer use is positively related to academic performance; however, no clear relationship has yet been established. Using a national database, we analyzed how students' school behavior (i.e., evaluated by English and math teachers) and standardized test scores (e.g., math and reading) are related to computer use for school work or other than school work for the tenth grade student. While controlling socioeconomic status (SES), home computer access, parental involvement, and students' academic expectation variables, the students who used a computer for one hour per day showed more positive school behaviors and higher reading and math test scores. This article concludes with implications for future study to better understand the impact of computer use on adolescent academic development. (Contains 2 tables.)