New editions of selected college textbooks have been found to be more difficult than former ones, and experiments show that students learn less effectively from the new editions. Guidelines are offered for choosing textbooks, such as writing style, conceptual density, and the utility of readability analyses. (Editor/LBH)

Study was concerned with whether there is a practical difference between the reading ability of the eight, ninth, and tenth grade students and the readibility levels of their assigned textbooks in English, science and social studies. Findings show that most of the textbooks assigned were too difficult for effective instructional usage. (RB)

Focusing on what authors can do to facilitate learning from content area textbooks, this report labels authors as "considerate," providing text that readers can understand with a minimum of cognitive effort, or as "inconsiderate," creating text that requires a conscientious, highly skilled effort if readers are to comprehend…

Reported is a study designed to determine whether reading grade level (RGL) assessment techniques used for elementary and secondary education textbooks would discriminate among plant and soil science textbooks. The study was to select the RGL indices suited to quantify the readability of these sources, and to identify the factors affecting…