partially selective, with one or more classes of selective students, and a "virtual school" bringing together a single class of students from regional NSW. there are 47 fully or partially selective government high schools, including 17 fully selective high schools (some of which are co-educational and other provide a single-sex educational environment; 25 partially selective high schools (high schools with both selective and comprehensive classes); four selective agricultural high schools; and one virtual selective high school. Of the 47 school, 34 are located in greater metropolitan Sydney. The Aurora College is a virtual selective high school that caters for students enrolled in government high schools in rural or remote areas in New South Wales. Virtual classes commenced in January 2015 with over 160 students. The school is managed from administrative offices based in . Aurora allows students in rural and remote areas to remain in their local school and community while studying specialist subjects which their home school cannot currently offer. The College uses a range of technologies to access more fast-paced lessons delivered by video and interact with each other, and attend a residential program held twice per year. Partially selective schools A number of schools have been designated as "partially selective", in that they have self-contained classes to provide for gifted and talented students in the junior years of high school. Often, schools combine selective and comprehensive streams as students enter the senior years, however, in practice, selective students tend to "self-select" into more advanced classes, such as extension units in Mathematics and English. Admission and criteria Profile score In general, entry into a government selective school is determined by a profile score, which is derived by combining school marks in English and mathematics with the marks received in the Selective High School Placement Test in reading, writing, mathematics and general ability. The profile score is computed by adding together with the component scores for English, mathematics and general ability, each of which are marks out of 100, to form the profile score out of 300. the component scores are computed as follows: In general ability the test marks are scaled on a statewide basis to a mean of 60 and a standard deviation of 12 to form the component general ability score out of 100. In mathematics, the component score is the scaled average of the scaled test mark and the moderated school mark. The raw test