The formal, usually annual, interim examinations ("Промежуточная Аттестация"), even the online ones, are mandatory at least in the 4th and 9th grades. Many children finish a 9-year curriculum in less than 3 years. There is also a hybrid form of education, when the child can attend the classes of his choice and the rest of the subjects study on his own. Home education (called "izobraževanje na domu" in Slovene) is legal in Slovenia since 1996. The law regarding home education has not been changed since then. It is almost identical to Montenegrin model of home education. According to Slovenian Ministry of Education it was based on Danish model of home education. The compulsory school-age starts at 6 and lasts for 9 years (page 18 (8666), article 45). The child being home educated is required to enroll into a local school (public or private) and pass annual exam in certain subjects (mother tongue and math only in lower grades; with addition of foreign language in middle grades and more subjects in higher grades, Page 22(8670) Article 90). If the child does not pass all the exams in two attempts, it is ordered to continue the education with regular school attendance. Every year the parents have to notify the school before starting new school year that they will be home educating their child. There are no special requirements for parents wanting to home educate their children. Parents are "not" eligible for any kind of state help "nor" are schools required to provide any kind of assistance. The schools are free to choose (they often do) whether they will allow special arrangements with home educated children (flexi-schooling, the use of school resources, participation in field trips and other school activities, etc.). The Ministry of Education and schools are "not" required to provide any form of help to parents of home educated children (teacher guides, worksheets, consultation, etc.). In the school year 2010/2011 97 children have been home educated. As of July 2011 there are no organised home education groups in Slovenia. Homeschooling is legal in Slovakia. However, a child's tutor is required to have a degree with a major in primary school education, and homeschooling is restricted only to the first four years of primary education. In Spain homeschooling is in somewhat of a legal vacuum. On the one hand in Article 27 the Spanish Constitution talks of compulsive education (not schooling), the freedom of teaching and the right of parents to choose their children's education in accordance with their own personal, moral and religious convictions.