The purpose of this design experiment was to research, test, and iteratively derive principles of word learning and word organization that could help to theoretically advance our understanding of vocabulary development for low-income preschoolers. Six Head Start teachers in morning and afternoon programs and their children (N = 89) were selected…

The purpose of this study was to examine the hypothesis that helping preschoolers learn words through categorization may enhance their ability to retain words and their conceptual properties, acting as a bootstrap for self-learning. We examined this hypothesis by investigating the effects of the World of Words instructional program, a supplemental…

Recognizing the importance of starting early, the purpose of our article is to examine if and how vocabulary is taught in commercially prepared early literacy curriculum for pre-K. Ten curriculum programs are reviewed to determine the prevalence of vocabulary instruction and the pedagogical practices used to support the learning of words and their…

The selection of books to read to young children matters enormously in the role books play for enriching children's lives. This paper reviews the scientific evidence for the appropriate selection of books, and argues that care in selecting books targeted to children's developing skills will enhance the power and the pleasures of reading to young…