In American public schools co-education is almost universally practiced. In reference to this matter we give the opinions of some prominent educators. The lamented Dr. Harris, while engaged in the St. Louis, Mo., schools, wrote: "Discipline has improved continually with the adoption of mixed schools;... the mixing of the male and female departments of a school has always been followed by improvement in discipline, not merely on the part of the boys, but on that of the girls as well. The rudeness and abandon which prevail among boys when separate at once give place to self-restraint in the presence of girls. The prurient sentimentality engendered by educating girls apart from boys... disappears almost entirely in mixed schools."[30] The Honorable John Eaton while Commissioner of Education of the United States made report concerning the co-education of the sexes in several hundred large and small cities in the Union. The tenor of the entire report is well summarized in the following sentence: "We are created male and female; all the impulses and activities of nature enforce co-education; if we must live together we must be educated to that end; to educate separately is an attempt to change the natural order of human economy."[31] In our higher institutions of learning the situation is much the same. The Commissioner of Education, referring to the State University of Iowa, writes, "The report of the president says that the experience of the institution has uniformly been favorable to the co-education of the sexes; that their influence on each other in the acquisition of learning has been most beneficial as well as conducive to orderly habits. The presence of both sexes is considered 'an invaluable feature' in restraining indecorum and an 'inducement to every virtue.'"[32] The practice has continued with similar results throughout the entire country. Instances favorable to co-education might be multiplied. Its adoption has become a foregone conclusion so far as our general system of education is concerned. True we do have some colleges and a few secondary schools devoting themselves exclusively to the education of one or the other of the sexes. Not many of them are state institutions. They are usually private schools and they answer a certain demand whether well founded or not. There are certain questions in connection with the education of the sexes which are fundamental and need considerable attention. However, no attempt can be made here to solve the many important problems suggested. It is the intent only to emphasize the necessity of being awake to real conditions and to indicate the fact that herein lies a field for the educator's most careful consideration.