The effect of enrollment in prerequisite courses on success in advanced courses was examined in a study of a sample of students who completed a business cooperative experiences program between 1994-1995 and 2001-2002. Of the 163 students in the sample, 80 completed the prerequisite courses (Technology Lab I and II) before the advanced course, and 83 did not take the prerequisite course. Ex post facto research was used to compare the following factors: students' attendance/days missed; employer and program coordinator evaluations of students' performance; and students' term 1 and term 2 grades. A two-tailed Pearson correlation test was used to identify relationships between individual factors. No relationship was found between students' completion of the prerequisite courses and their success in the advanced course. According to the instructor coordinator, some of the more successful students in the advanced program were the ones who had not taken the prerequisite courses. However, those students had excellent skills, work ethics, and attendance. (The bibliography lists four references. The following items are appended: tables of statistical correlations; descriptions of the study courses; ERIC database entries for two studies on the effects of prerequisites; and the information on prerequisites that is provided to students at Santa Rosa Junior College, California.) (MN)