“…Correlational studies have shown associations between quality and quantity of teacher language use and children's language skills (e.g., Huttenlocher, Vasilyeva, Cymerman, & Levine, 2002;Reese & Cox, 1999;Weizman & Snow, 2001), and experimental studies have shown that increases in teacher use of specific language structures or functions impact aspects of children's language comprehension and expression (e.g., Han, Roskos, Christie, Mandzuk, & Vukelich, 2005;Justice, Meier, & Walpole, 2005). Of relevance to this research are studies showing that the conceptual complexity of teacher language directly relates to children's receptive and expressive language skills (Wasik & Bond, 2001;Wasik, Bond, & Hindman, 2006).…”