more positive student role models, (12) Allows for more opportunities to provide social and moral guidance, (13) Provides choice in public education. Later studies Australian researchers reported in 2009 that high school students' interpersonal relationships were positively associated with both academic and nonacademic achievement, although the interaction between boys and girls in a majority of cases resulted in less homework done, less enjoyment of school, and lower reading and math scores. A UCLA report commissioned by the National Coalition of Girls' Schools used data from an extensive national survey of U.S. college freshmen and found stronger academic orientations among women who had attended all-girls, compared to coeducational high schools, but the effects were minor, and the authors concluded "that the marginal benefits do not justify the potential threats to gender equity brought on by academic sex segregation". In September 2011, the journal Science published a study deeply critical of gender-segregated schooling, arguing that the movement towards single-sex education "is deeply misguided, and often justified by weak, cherry-picked, or misconstrued scientific claims rather than by valid scientific evidence". The study goes on to conclude that "there is no well-designed research showing that single-sex (SS) education improves students' academic performance, but there is evidence that sex segregation increases gender stereotyping and legitimizes institutional sexism." Leonard Sax, the President of National Association for Single-sex Public Education or NASSPE, countered the Science article by saying that "ALL the studies cited in the SCIENCE article regarding 'negative impacts' were in fact studies involving a small number of PRE-SCHOOL students attending a COED pre-kindergarten" (capitalized letters in the original). He further said that "these authors provide no evidence for their substantive claim that 'gender divisions are made even more salient in SS settings.' In fact, this conjecture has been tested, and proven false, in multiple studies." Sax cited a study which said that "girls in the all-girls classroom were less aware of 'being a girl' and less aware of gender stereotypes regarding science, compared to girls who were randomly assigned to the coed classroom." In January 2012, a study of the University of Pennsylvania, involving a randomized experiment, considered the experiment with the highest level of scientific evidence. The data comes from schools in South Korea, where a law was passed randomly assigning students to schools in their district. The study by Park, Berhman, and Choi titled Causal Effects of Single-Sex Schools on College Entrance Exams