“…Some advocates have proposed building collaborative professional communities of teachers and researchers as a promising vehicle for developing professional knowledge (Clark et al, 1996;Garet, Porter, Desimone, Birman, & Yoon, 2001;Stein, Silver, & Smith, 1998;Thomas, Wineburg, Grossman, Myhre, & Woolworth,1998). Research on mentoring and peer teaching offers additional possibilities for encouraging collaboration that connects practice to theory (Martin, 2002;Slavin, 1996).…”