“…Researchers have linked coaching to changes in teacher behavior (Domitrovich, Gest, Gill, Jones, & DeRousie, 2009;Filcheck, McNeil, Greco, & Bernard, 2004;Lieber et al, 2009;Lyon et al, 2009) and teachers' sustained use of practices (Lieber et al, 2010). Coaching also seems to facilitate early childhood teachers' language and literacy knowledge and skills (Armstrong, Cusumano, Todd, & Cohen, 2009;Cusumano, Armstrong, Cohen, & Todd, 2006, Hsieh, Hemmeter, McCollum, & Ostrosky, 2009Mohler, Yun, Carter, & Kasak, 2009;Neuman & Wright, 2010;Powell, Diamond, Burchinal, & Koehler, 2010) and use of math-mediated language (Rudd, Lambert, Satterwhite, & Smith, 2009), a technique teachers use to informally but intentionally discuss mathematical concepts in activities with young children (Rudd, Satterwhite, & Lambert, 2010).…”