Joslin was an educator at heart and advocated total immersion of his patients and families in classroom education. He felt that careful monitoring of diabetes that rendered good control would allow the patient to avoid chronic complications of diabetes along with prevention of acute acidosis. Joslin included the findings from 1,000 of his own cases in his 1916 monograph "The Treatment of Diabetes Mellitus", the first textbook on diabetes in the English language. Here he noted a 20 percent decrease in the mortality of patients after instituting a program of diet and exercise. This physician's handbook had 10 more editions in his lifetime and established Joslin as a world leader in diabetes.