Discusses research in North Carolina during the 1970s that lead to graduated driver licensing, some of the educational principles on which it is based, obstacles to its acceptance, and some of the early efforts to implement it in the United States and elsewhere. (Contains 1 figure and 17 references.) (AUTHOR/WFA)

This paper reviews methods which have been used to identify and validate learning hierarchies. Specifically, three methods which reflect the notion of a relatively inviolate sequence are discussed and compared. Two of the psychometric methods compare pairs of skills, the ordering-theoretic method (Bart and Krus) and the test of inclusion (White…