in Gothenburg, Askersunds flickskola (1812) in Askersund, and Wallinska skolan (1831) in Stockholm. During the second half of the 19th century, secondary education girl schools were in most Swedish cities. All of these were private, except the women's college Högre lärarinneseminariet in Stockholm from 1861, and its adjacent girls' school Statens normalskola för flickor. The Girls' School Committee of 1866 organized the regulation of girls' schools and female education in Sweden: from 1870, some girls' schools were given the right to offer the gymnasium (school) level to their students, and from 1874, those girls' schools which met the demands were given governmental support, and some were given the right to administer the school-leaving exam. This was necessary to make it possible for women to enroll at the universities, which had been opened to women in 1870, as female students were not accepted in the same middle schools as male students. Between 1904 and 1909, girls were integrated with state boys' schools on the secondary levels, making it possible for girls to complete their elementary- and middle-level education in a state school instead of going to an expensive private girls' school. Finally, in 1927, all state secondary schools for boys were integrated, and the private girls' schools started to be transformed into coeducational schools, a process which was completed by 1970. United Kingdom While England has a very strong tradition of single-sex education, Scottish education was largely mixed, and Wales introduced dual schools (a girls' side and a boys' side under one roof) in 1889. In England, most secondary education was single-sex until the 1970s. Single-sex schooling was traditionally the norm for secondary schools in most parts of the United Kingdom, especially for private, grammar and secondary modern schools, but most UK schools are now coeducational. In the state sector of the U.K. education system very few single sex schools remain. The number of single-sex state schools has fallen from nearly 2,500 to just over 400 in 40 years. According to Alan Smithers, Professor of Education at Buckingham University, there was no evidence that single-sex schools were consistently superior. A major longitudinal study of over 17,000 individuals examined whether single-sex schooling made a difference for a wide range of outcomes, including academic attainment, earnings, marriage, childbearing and divorce. The authors found that girls fared better in examinations at age 16 at single-sex schools, while boys achieved similar results at single-sex or