The book cites data from student surveys and transcript analysis to show that many college students have minimal classwork expectations -- and then it tracks the academic gains (or stagnation) of 2,300 students of traditional college age enrolled at a range of four-year colleges and universities. The students took the Collegiate Learning Assessment (which is designed to measure gains in critical thinking, analytic reasoning and other "higher level" skills taught at college) at various points before and during their college educations, and the results are not encouraging:
- 45 percent of students "did not demonstrate any significant improvement in learning" during the first two years of college.
- 36 percent of students "did not demonstrate any significant improvement in learning" over four years of college.
- Those students who do show improvements tend to show only modest improvements. Students improved on average only 0.18 standard deviations over the first two years of college and 0.47 over four years. What this means is that a student who entered college in the 50th percentile of students in his or her cohort would move up to the 68th percentile four years later -- but that's the 68th percentile of a new group of freshmen who haven't experienced any college learning.