The purposes of this study were to assess the presence and use of instructional aids and teaching arrangements in Mexican universities; to explain the existence and use of such aids; and to suggest policies and procedures intended to improve instruction in Mexican universities. Interviews were conducted with the directors of and a sample of professors in all faculties (or schools) of all Mexican universities and all higher Normal schools (secondary teacher training schools). Enormous heterogeneity among institutions appeared in enrollment, staff and budget, in general characteristics of faculties and schools, as well as in the possession and use of instructional aids. The data confirmed some of the stereotypes about instruction in Latin American universities. The generally held belief that Law is the most conservative and the poorest of all faculties was borne out by the evidence. Law is lowest in having and using all kinds of technical aids and in trying flexible teaching arrangements, and professors tend to spend no time on research. Medicine is the favored faculty. Physical Sciences has the highest unit costs when the aggregate measure of budget per student is used. The duplicating machine is the most commonly encountered piece of equipment; the calculator the least. Use of TV is rare. Libraries are overwhelmingly deficient. In general, faculties have very few teaching aids of any kind. (JS)