This study was conducted to determine the effects of gainful employment on the academic performance of full-time community college students. A measurement called activity units was created. One hour of academic credit equals three activity units on the basis of one hour in class and two hours of preparation. An hour of gainful employment equals one activity unit. The winter 1974 grade point averages (GPA's) of 722 full-time students enrolled at Delaware County Community College, Media, Pennsylvania, were analyzed to determine if there was a significant relationship between number of activity units and GPA for eight separate categories of students (16-19-year-old single female, 16-19-year-old single male, 20-23-year-old single female, 20-23-year-old single male, 24 years of age or older single female, 24 years of age or over single male, 20 years of age or older married female, and 20 years of age or older married male). As a result of the data analysis, it was concluded that at the .05 level of significance, there was a relationship for all categories except the single females aged 16-19 between number of activity units and GPA. The data indicated that those students carrying between 50 and 59 activity units had the highest level of academic success, and all those carrying over 50 activity units earned higher GPA's than did students carrying less; that married students achieved higher GPA's than single students; that married female students achieved much higher GPA's than any other category; and that students carrying 80 or more activity units have almost exactly the same level of success as the entire sample. (Author/DB)