This report discusses the results of the College Assessment of Academic Proficiency (CAAP) at the College of DuPage (Illinois). The CAAP is a national exam that assesses general learning in six areas: critical thinking, science reasoning, writing skills, essay writing, reading, and mathematics. Based on data from a total of 3,322 students tested between 1999 and 2001, results include: (1) entering first-year students at DuPage are significantly below four-year public college freshmen in reading skills, mathematics skills, science reasoning, and writing skills; (2) DuPage sophomores' mathematics averages significantly exceed the two-year public college norms; (3) completing sophomores are similar to other two-year public college sophomores in their writing skills, but still significantly lower than their four-year public college sophomore colleagues; (4) DuPage's students are functioning at levels similar to two-year freshmen and sophomores, but below the four-year public college level in essay-writing skills; (5) the critical-thinking skills of DuPage students, while similar to both entering first-year students and completing sophomores to their two-year public college colleagues, do not change significantly over their studies; and (6) DuPage students perform significantly lower in their science reasoning skills than four-year public college students, but, like most of the other skills, their abilities in science reasoning improve during their tenure at DuPage. (Contains 40 tables.) (EMH)