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Williams, Joanne – 1979
The Fry Graph for Estimating Readability (Extended) and George Magginnis' formula for passages shorter than 100 words were used in an investigation of the reading levels of 18 mathematics textbooks produced for grades one through six by three major publishers. The results indicated that the readability levels of the textbooks were inaccurate. Few…
Descriptors: Elementary Education, Masters Theses, Mathematics Materials, Performance Factors
Chall, Jeanne S. – 1977
Reading selections from six Scholastic Aptitude Tests (SAT) administered from 1947 to 1975 were analyzed to determine whether a decrease in the difficulty level of elementary and secondary textbooks, workbooks, and teachers' guides corresponded with the SAT score decline. Various indices of reading difficulty and challenge were used. Readability…
Descriptors: Assignments, College Entrance Examinations, Comparative Analysis, Difficulty Level