The Presence and Progression of Rare Vocabulary in Texts Across Elementary Grades and Between Genres: How Rare Words Increase the Challenge of Reading and What We Can Do About It
The authors examined a set of rare words from narrative and expository texts aimed at Grades 1, 3, and 5. The purpose of the study was to determine the proportions of rare words that occurred across grade levels and genres, as well as to examine the features of rare words that occurred in these elementary texts.














