It was the purpose of this study to determine the readability level of all social studies textbooks authorized for purchase in the adoption made by the Textbook Commission of the Indiana State Board of Education on December 12, 1968 for five years beginning July 1, 1969. A thorough search of the literature and research did not reveal that their readability level had been determined. Consequently, twenty-three textbooks were analyzed utilizing the Dale-Chall formula for written materials. The curricular areas were: Indiana history in grade 4, United States and Canadian studies in Grade 5, and Latin American and Western American studies in grade 6. Chapter 3 described: 1) the methods of collecting the materials studies; 2) the treatment of the source materials; and, 3) the statistical analysis of the data presented in detail in chapter 4 and the appendix by grade level and by text. The summary findings and conclusion in chapter 5 were: 1) the text for grade 4 were above the intended readability level; 2) the texts for grade 5 and 6 appeared to be at or below the intended readability level; 3) no text examined appeared to be written with any idea of progressive difficulty in mind; however, 4) there was a wide range of level within each text. It was recommended that texts be carefully examined for readability level before adoption. (Author/SBE)