This bulletin from the Center for Statistics (CS) attempts to shed light on the potential impact of new college eligibility requirements linking extracurricular participation to academic performance. The CS-sponsored longitudinal study, "High School and Beyond" (HS&B), was used as the data source for estimates; the information on coursework credits earned and grade point averages was taken from high school transcripts and questionnaires. Data shows that 80 percent of 1982 high school seniors participated in extracurricular activities. Except for hobby clubs and vocational education clubs, participation rates tended to be highest for students who were from high socioeconomic status backgrounds, who were pursuing an academic curriculum, and who made good (B+ or better) school grades. Differences in participation rates among racial-ethnic groups tended to be small. Two exceptions were varsity athletics and chorus or dance, with a higher percentage of black students participating. The more activities students were involved in, the higher they ranked academically, indicating that extracurricular activities attract many bright, high-performing students. An overwhelming majority of extracurricular activity participants would meet the requirements of a cumulative 2.0 grade point average (GPA). Included in the report are technical notes on methodology and charts relating extracurricular activity and student characteristics to percentage of 1982 seniors who had a cumulative GPA of 2.0 or more. (PS)