Academically Adrift: Limited Learning on College Campuses

Proponents of online education frequently cite this book-length report, which offers a scathing indictment of the quality of teaching at traditional colleges. The authors used a standardized test called the Collegiate Learning Assessment to compare what students knew as they entered college to their performance at the end of their second year of college, and found that 45 percent showed no significant improvement in a range of skills.