Argues that health educators must learn to predict readability levels of textbooks to be sure that they are challenging and understandable to the student. Concludes that this can be accomplished through the use of readability formulas. (FL)

Argues that the Degrees of Reading Power test is not a valid tool for its main purpose, matching students to appropriate texts, because the test's units of text difficulty are not uniformly comparable to the test's units used to reflect a reader's ability. (HOD)

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)