Following a brief discussion of two facets of written material readability--reading ease and human interest--two reasons why written instructional material may be so difficult to read are considered: use of technical vocabulary and abstract language. Suggestions to make written instructional materials more readable are provided. (MBR)

Some factors that should be considered when science teachers produce materials for their students are presented. Readability and the key aspects of language (vocabulary, sentence structure, textbook or examination style, and organization and presentation) are discussed. Directions and the graph needed for estimating the reading level of materials…

Two studies investigated the relationships between readability, prior knowledge, and interest in the material being read. In the first study, 169 college freshmen read cloze passages of materials from the Nelson-Denny Reading Tests, then one week later read the whole passages and completed the related multiple choice questions. A control group…