Presents a study of United States History textbooks that identifies possible shortcomings of several readability formulas as tools in determining the appropriateness of reading materials. Suggests additional factors to consider when selecting textbooks and techniques to help students understand reading materials. (AEM)

Describes how social studies teachers can help students interact with textbooks to promote better comprehension and retention of information. Suggests methods for linking existing knowledge to concepts in the text, for organizing information to encourage retention, and for making the expository style of texts more accessible. (LS)

The Raygor Readability Estimate, described in this article, is much like the widely used Fry Readability Graph, except that it determines vocabulary difficulty by counting words of six or more letters, rather than by counting syllables. An evaluation found that Raygor was faster and easier to use and more objective than the Fry method. (RM)