Charles C. Fries, the director of the English Language Institute at the University of Michigan, the first of its kind in the United States, believed that learning structure, or grammar was the starting point for the student. In other words, it was the students' job to orally recite the basic sentence patterns and grammatical structures. The students were only given “enough vocabulary to make such drills possible.” (Richards, J.C. et-al. 1986). Fries later included principles for behavioural psychology, as developed by B.F. Skinner, into this method.