One of the most successful attempts to give instruction in the trades in the public high school and at the same time to preserve the best of the traditional high-school course is that begun at Fitchburg, Massachusetts. The cooperative plan, adopted in imitation of that in use in the college of engineering of the University of Cincinnati, has become widely know as the "Fitchburg plan." There is a demand from high-school officials and others interested in secondary education for the fuller and more accurate information about the plan, the methods of its application, and the results obtained that can be had from the many brief partial accounts which have appeared in the magazines and school journals. The plan, which is based on sound principles of pedagogy and might well be adopted, with necessary modifications in many other cities and towns, is discussed in detail in this bulletin. (Contains 5 illustrations.) [Best copy available has been provided.]