The purpose of this study is to determine the relation of achievement to two different methods of providing for individual differences. Achievement means educational growth or achievement in subject matter and personality development. The two methods are the qualitative, that is, the degree of difficulty of the work assigned, and the quantitative, which means the amount of work done or the minimum-maximum assignment.

Early general history up to 1900. "I have listened to the stories told about it by the old time cowboys, by the old settlers, and by some of the old Fort Concho soldiers themselves. As a result of this experience, I have wanted to go into its past more carefully and search for more facts regarding the region, its first inhabitants, and its early history in general."-- leaf iii.