Readability formulas typically yield results stated as a number or grade equivalent. However, results of one formula may not be compared to another because formulas use different criteria to measure readability. A description of eight popular formulas illustrate this point. Suggests that other factors be considered when selecting reading…

Discusses reading levels of books in the sciences, and explains the use of the Readability Graph. Also reported are reading levels of selected high school physics texts. (GA)

Discusses categories for science textbook analysis under the headings of: Readability, Content, Presentation of Material, Mathematical Demands, Appearance, Quality of Illustrations, and Teacher Aids. An analysis form is appended as a guide for science teachers and administrators in their evaluation and selection of appropriate science textbooks.…

Discusses findings from a questionnaire survey of 622 biology teachers on: (1) how accurately they can judge readability of instructional materials; (2) what factors they consider when judging readability levels; and (3) if they considered differences in students' reading ability when selecting reading materials for them to use. (JN)

Presents research findings about textbook construction and how they should influence the development of chemistry texts. Discusses learning as a constructive process, the importance of interpreting symbolic representations, and the creation of structure by the learner. Advocates publisher responsibility for incorporating results of research when…