“…A multitude of studies have found that place value is a difficult concept for young children (Carpenter, Franke, Jacobs, Fennema, & Empson, 1998;Cauley, 1988;Cobb & Wheatley, 1988;Fuson, 1986Fuson, , 1988Fuson, , 1992Fuson & Briars, 1990;Ginsburg, 1989;Kamii, 1986;Miura & Okamoto, 1989;Resnick & Omanson, 1987;Ross, 1989Ross, , 1990Varelas & Becker, 1997). It takes several years for children to develop an understanding of the base-10 system and place-value notation.…”