* * * There are about170,000 students of all kinds. Among them, there are nearly 300 research universities, which can carry out undergraduate, vocational diploma and postgraduate (master's and doctoral) education, and can award the highest degree. In addition, there are more than 2,200 four-year colleges, which mainly provide undergraduate education and award students bachelor's degrees. Among these colleges, Amherst College, Pomona College, Swarthmore College, Wellesley College, Williams College and Smith College are among the best. These colleges are famous in the United States for their undergraduate education. After graduation, a considerable number of their students also entered the most famous research universities in the United States for further study. Two-year community colleges are about 1600, which can only grant students "associate degree" with low tuition fees, and two-thirds of them are part-time students. We use Go to compare the approximate ranking of famous American universities and colleges (here only refers to undergraduate education): ten universities ("super" first-class universities, six universities), Harvard University, Yale University, Princeton University, Stanford University, Massachusetts Institute of Technology, California Institute of Technology ("very strong" first-class universities, 15) Columbia University, University of Pennsylvania, Brown University, Cornell University, Dartmouth University, University of Chicago, Northwestern University, Johns Hopkins University, Duke University, St. Louis and some of the most famous colleges of arts and sciences: Amherst College, Williams Eight Universities ("strong" first-class universities, 1 1) Carnegie Mellon University. And some liberal arts colleges: carleton college, Middlebury College, Smith College, Bowdoin College, davidson college. Seven universities (first-class universities, 16) University of California at Berkeley, University of Virginia, University of Michigan at Anyinling, University of California at Los Angeles, University of North Carolina at Chapel Hill, University of Southern California, Tufts University, Wake Forest University, College of William and Mary, University of Wisconsin at Madison, case western reserve university and some liberal arts colleges: Haverford College, clermont McKenna College in Claremont, Wesleyan College. Liuduan University (a "slightly weaker" first-class university, 25) Brandeis University, Lehigh University, Boston College, new york University, University of Rochester, University of California, San Diego, Georgia Institute of Technology, University of Illinois at Urbana-Champaign, seattle university, Rensselaer Institute of Technology, University of California, Irvine, tulane university, Yeshiva University, Pennsylvania State University Park, University of Texas at Austin. And some liberal arts colleges: Harvey Mudd College, Hamilton College, Colgate College, American Naval Academy and Oberlin College. The so-called prestigious schools (here, undergraduate education) do not have a clear standard, but are generally recognized by the society, and the lists published by different institutions are different. In the above-mentioned hierarchical list, 8- 10 colleges and universities can be considered as world famous schools. And 6-7 universities can be considered as national famous schools, and some of their majors also enjoy world reputation. (In Go, paragraph 6 is a very high-level player and a national player! Moreover, it should be emphasized that undergraduate education in American universities is not as different as everyone thinks; Studying in the top 100 research universities or colleges of arts and sciences can get a good basic training. If the big difference may come from the difference of students' level, generally speaking, the more prestigious schools, the higher the average level of students, and the more active the interaction between students.