“…Communication has been recognized as one of the crucial facets in developing young children's conceptual understanding, thinking, problem-solving skills, and reasoning in mathematics (e.g., Charlesworth, 2005;Griffin, 2004;Yackel, 1995). Researchers in the field of early childhood education also have emphasized that teachers must encourage young children to communicate their mathematical understanding in the classroom (e.g., Amos, 2007;Blake, Hurley, & Arenz, 1995;Ginsburg & Amit, 2008;Greenes, Ginsburg, & Balfanz, 2004;Varol & Farran, 2006). Nevertheless, there are few empirical studies of how early childhood teachers understand the role of communication in teaching mathematics in their classrooms.…”