E/C.12/SVN/CO/2 (a) Roma children are rarely enrolled in preschool educational institutions; (b) The majority of Roma children in primary and secondary school are enrolled in classes for children with special needs; (c) Roma children achieve low school performance even at primary level; (d) Roma School drop-out rate at all school levels remains high (art. 13). The Committee urges the State party to strengthen the implementation of, and resources allocated to, existing measures, and adopt other effective and adequately resourced measures aimed at integrating Roma children into preschool institutions; ending school segregation; and reducing school dropout, including through enhancing access to, and the quality of, education for Roma. Rights of national or ethnic minorities 28. The Committee regrets the lack of information on the situation of national and ethnic minorities in the State party and on their actual enjoyment of rights under article 15 of the Covenant (art. 15). The Committee recommends that the State party take effective measures to ensure enjoyment of the right to take part in cultural life, including by minorities, and to report on such measures in its next periodic report. In that regard, the Committee draws the attention of the State party to its general comment No. 21 (2009) on the right of everyone to take part in cultural life. D. Other recommendations 29. The Committee recommends that the State party expand its dialogue and cooperation with civil society organizations working in the area of promotion and protection of economic, social and cultural rights. The Committee also encourages the State party to consult with civil society organizations on the implementation of the Committee’s recommendations and the preparation of the next periodic report. 30. The Committee, while acknowledging the contribution of the State party to official development assistance, encourages the State party to gradually increase its official development assistance with a view to achieving the international commitment of 0.7 per cent of its gross national product (GNP) and to pursue a human rightsbased approach in its development cooperation policy, fully incorporating the rights contained in the Covenant. 31. The Committee encourages the State party to expedite its efforts in ratifying the Optional Protocol to the International Covenant on Economic, Social and Cultural Rights as indicated during the dialogue, and to consider ratifying the International Convention on the Protection of the Rights of All Migrant Workers and Members of Their Families, and the International Convention for the Protection of All Persons from Enforced Disappearance. 32. The Committee requests the State party to disseminate the present concluding observations widely at all levels of society, particularly among parliamentarians, public officials, judicial authorities and civil society organizations, and to inform the Committee in its next periodic report on the steps taken to implement them. 33. The Committee requests the State party to submit its third periodic report, in accordance with the guidelines adopted by the Committee in 2008 (E/C.12/2008/2), by 30 November 2019. 9