or Russian, with corresponding minority language and culture taught as subjects. The network of Russian-language schools is being reduced. Some Polish-language schools were created after restoration of independence. Education in public minority high schools is conducted mostly in Latvian since 2004 despite wide protests by the Headquarters for the Protection of Russian Schools. In Lithuania, as at 2004/2005, 91.3% of pupils studied in Lithuanian, 5.3% in Russian and 3.6% in Polish in general education schools. In Moldova, Moldovan (Romanian) is used, but Russian is slowly being introduced. In North Macedonia, the state is obliged by Ohrid Agreement to provide university level education in languages spoken by at least 20% of the population (Albanian) In Norway, the medium of instruction is Norwegian. The state undertakes to provide a substantial part of preschool education in Sami, at least pupils whose families request it in sufficient numbers. In Poland, the medium of instruction in most schools is Polish. However, in areas where national or ethnic minorities reside, there are as well public schools with minority language of instruction (such as German, Ukrainian, Belarusian, or Kashubian), or schools which offers classes of the minority language. In Romania, the medium of instruction is mostly Romanian, but the state undertakes to provide education in minority languages up to the following levels. In Russian, it is a substantial part of preschool education, at least to those pupils whose families request it in sufficient numbers. In Bulgarian and Czech, it is a substantial part of primary education. In Croatian, it is a substantial part of secondary education. In Serbian, Turkish, Ukrainian and Slovak, it is secondary education. In German and Hungarian, it is higher education. There are also international schools where the medium of instruction is English. In Russia, Russian is dominating in education. Approximately 6% of students learn at school in minority languages. Besides, some tertiary education establishments use Tatar as a language of instruction alongside Russian. In Slovakia, education in minority languages must be provided in municipalities if Slovak citizens speaking respective language are more than 20% of population: higher, technical and vocational education in Hungarian, a substantial part of technical and vocational education in Ruthenian and Ukrainian, a substantial part of preschool education for those pupils whose families request it in sufficient numbers in Bulgarian, Croatian, Czech, German, Polish and Roma. In Slovenia, the general medium of instruction is Slovene. In areas with the Hungarian