1. Snow CE, Burns S, Griffin P. Preventing reading difficulties in young children. Washington, D.C.: National Academies Press; 1998.

2. Walker D, Greenwood C, Hart B, Carta J. Prediction of school outcomes based on early language production and socioeconomic factors. Child Development. 1994;65(2):606-621.

3. Committee on Integrating the Science of Early Childhood Development. From neurons to neighborhoods: The science of early childhood development. Washington, D.C.: National Academies Press; 2000.

4. McCartney K. Effect of quality of day care environment on children's language development. Developmental Psychology. 1984;20(2):244-260.

5. NICHD Early Child Care Research Network. The relation of child care to cognitive and language development. Child Development. 2000;71(4):960-980.

6. Turnbull KP, Anthony AB, Justice L, Bowles R. Preschoolers' exposure to language stimulation in classrooms serving at-risk children: The contribution of group size and activity context. Early Education & Development. 2009;20(1):53-79.

7. Tabors PO. What early childhood educators need to know: Developing effective programs for linguistically and culturally diverse children and families. Young Children. 1998; 53(6):20-26.

8. Hoff E. How social contexts support and shape language development. Developmental Review. 2006;26(1):55-88.

9. Hart B, Risley TR. Meaningful differences in the everyday experience of young American children. Baltimore, MD: P.H. Brookes; 1995.

10. Piasta S, Justice L, Cabell S, Wiggins A, Turnbull K, Curenton S. Impact of professional development on preschool teachers' conversational responsivity and children's linguistic productivity and complexity. Early Childhood Research Quarterly. 2012;27(3):387-400.

11. Dickinson DK. Putting the pieces together: Impact of preschool on children's language and literacy development in kindergarten. In: Dickinson DK, Tabors PO, eds. Beginning literacy with language: Young children learning at home and school. 2001:257-287.

12. Girolametto L, Weitzman E. Responsiveness of child care providers in interactions with toddlers and preschoolers. Language, Speech, and Hearing Services in Schools. 2002;33(4):268-281.

13. Elley WB. Vocabulary acquisition from listening to stories. Reading Research Quarterly. 1989;24(2):174-187.

14. Huttenlocher J, Vasilyeva M, Cymerman E, Levine S. Language input and child syntax. Cognitive Psychology. 2002;45(3):337-374.

15. Espinosa L. The academic achievement of children of immigrant families: A research review with implications for closing the achievement gap. 2011. Accessed September 23, 2013.

16. Tomasello M, Farrar MJ. Joint attention and early language. Child Development. 1986;57(6):1454-1463.

17. Yu C, Smith L. Embodied attention and word learning by toddlers. Cognition. 2012;125(2):244-262.

18. Shimpi PM, Huttenlocher J. Redirective labels and early vocabulary development. Journal of Child Language. 2007;34(4):845-859.

19. Dunham PJ, Dunham F, Curwin A. Joint-attentional states and lexical acquisition at 18 months. Developmental Psychology. 1993;29(5):827-831.

20. Whitehurst GJ, Falco FL, Lonigan CJ, et al. Accelerating language development through picture book reading. Developmental Psychology. 1988;24(4):552-559.

21. Hindman A, Wasik B, Erhart A. Shared book reading and head start preschoolers' vocabulary learning: The role of book-related discussion and curricular connections. Early Education and Development. 2012;23(4):451-474.

22. Dickinson DK, Porche MV. Relation between language experiences in preschool classrooms and children's kindergarten and fourth-grade language and reading abilities. Child Development. 2011;82(3):870-886.

23. Mol SE, Bus AG, de Jong MT. Interactive book reading in early education: A tool to stimulate print knowledge as well as oral language. Review of Educational Research. 2009;79(2):979-1007.

24. Horst JS. Context and repetition in word learning. Frontiers in psychology. 2013;4:1-11.

25. Horst JS, Parsons KL, Bryan NM. Get the story straight: Contextual repetition promotes word learning from storybooks. Frontiers in psychology. 2011;2:17.

26. Lewis V, Boucher J, Lupton L, Watson S. Relationships between symbolic play, functional play, verbal and non-verbal ability in young children. International Journal of Language and Communication Disorders. 2000;35(1):117-127.

27. Kontos S, Keyes L. An ecobehavioral analysis of early childhood classrooms. Early Childhood Research Quarterly. 1999;14(1):35-50.

28. Yazejian N, Peisner-Feinberg ES. Effects of a preschool music and movement curriculum on children's language skills. NHSA Dialog. 2009;12(4):327-341.

29. Galicia Moyeda IX, Contreras Gomez I, Pena Flores MT. Implementing a musical program to promote preschool children's vocabulary development. Early Childhood Research & Practice. 2006;8(1).

30. Anvari SH, Trainor LJ, Woodside J, Levy BA. Relations among musical skills, phonological processing, and early reading ability in preschool children. Journal of Experimental Child Psychology. 2002;83(2):111-130.

31. Goodwyn SW, Acredolo LP, Brown CA. Impact of symbolic gesturing on early language development. Journal of Nonverbal Behavior. 2000;24(2):81-103.

32. Rowe ML, Goldin-Meadow S. Early gesture selectively predicts later language learning. Developmental Science. 2009;12(1):182-187.

33. Rowe ML, Özçalişkan Ş, Goldin-Meadow S. Learning words by hand: Gesture's role in predicting vocabulary development. First Language. 2008;28(2):182-199.

34. Iverson JM, Goldin-Meadow S. Gesture paves the way for language development. Psychological Science. 2005;16(5):367-371.