“…In STEM courses, females participated more and identified more with the subject matter when instructors were female ( Stout et al ., 2011 ; Young et al ., 2013 ). Some studies have found that instructors of the same gender, particularly instructors students perceive as competent, can improve the performance of female students ( Haley et al ., 2007 ; Hoffman and Oreopoulos, 2009 ; Carrell et al ., 2010 ; Antecol et al ., 2012 ), while other studies found no difference ( Griffith, 2010 ; Price, 2010 ; Stout et al ., 2011 ). Thus, an instructor effect in college-level STEM courses remains a contentious issue that would benefit from further exploration.…”