The cost of college has skyrocketed and a four-year degree has become an ever more essential cornerstone to a middle-class standard of living. But what are America’s kids actually learning in college?

For an awful lot of students, the answer appears to be not much.

A provocative new book, “Academically Adrift: Limited Learning on College Campuses,” makes a strong case that for a large portion of the nation’s seemingly successful undergraduates the years in college barely improve their skills in critical thinking, complex reasoning and writing.

Intellectual effort and academic rigor, in the minds of many of the nation’s college students, is becoming increasingly less important. According to the authors, Professors Richard Arum of New York University and Josipa Roksa of the University of Virginia: “Many students come to college not only poorly prepared by prior schooling for highly demanding academic tasks that ideally lie in front of them, but  more troubling still  they enter college with attitudes, norms, values, and behaviors that are often at odds with academic commitment.”

Students are hitting the books less and partying more. Easier courses and easier majors have become more and more popular. Perhaps more now than ever, the point of the college experience is to have a good time and walk away with a valuable credential after putting in the least effort possible.