“…Research studies and standardized assessment results have demonstrated a need for educators to explore ways to close the gender gap in the area of science favoring males (e.g., Ferreira, 2001;Lee & Burkam, 1996;NAEP, 2005;Vasquez, Teferi, & Schicht, 2003). Prior research studies reported findings that same-gender grouping leads to higher academic achievement and a more positive classroom climate than coeducational groupings (e.g., Hamilton, 1985;Klebosits & Perrone, 1998;Norfleet James & Richards, 2003;Riordan, 1990). However, many other studies reported findings that results are negative or inconclusive when comparing achievement and environment in same-gender and coeducational settings (e.g., Datnow, Hubbard, & Woody, 2001;Ferney & Domingue, 2000;LePore & Warren, 1997;Viadero, 2002).…”