47. The obligation to respect requires States parties to avoid measures that hinder or prevent the enjoyment of the right to education. The obligation to protect requires States parties to take measures that prevent third parties from interfering with the enjoyment of the right to education. The obligation to fulfil (facilitate) requires States to take positive measures that enable and assist individuals and communities to enjoy the right to education. Finally, States parties have an obligation to fulfil (provide) the right to education. As a general rule, States parties are obliged to fulfil (provide) a specific right in the Covenant when an individual or group is unable, for reasons beyond their control, to realize the right themselves by the means at their disposal. However, the extent of this obligation is always subject to the text of the Covenant. 48. In this respect, two features of article 13 require emphasis. First, it is clear that article 13 regards States as having principal responsibility for the direct provision of education in most circumstances; States parties recognize, for example, that the “development of a system of schools at all levels shall be actively pursued” (art. 13 (2) (e)). Secondly, given the differential wording of article 13 (2) in relation to primary, secondary, higher and fundamental education, the parameters of a State party’s obligation to fulfil (provide) are not the same for all levels of education. Accordingly, in light of the text of the Covenant, States parties have an enhanced obligation to fulfil (provide) regarding the right to education, but the extent of this obligation is not uniform for all levels of education. The Committee observes that this interpretation of the obligation to fulfil (provide) in relation to article 13 coincides with the law and practice of numerous States parties. Specific legal obligations 49. States parties are required to ensure that curricula, for all levels of the educational system, are directed to the objectives identified in article 13 (1). 23 They are also obliged to establish and maintain a transparent and effective system which monitors whether or not education is, in fact, directed to the educational objectives set out in article 13 (1). 50. In relation to article 13 (2), States have obligations to respect, protect and fulfil each of the “essential features” (availability, accessibility, acceptability, adaptability) of the right to education. By way of illustration, a State must respect the availability of education by not closing private schools; protect the accessibility of education by ensuring that third parties, including parents and employers, do not stop girls from going to school; fulfil (facilitate) the acceptability of education by taking positive measures to ensure that education is culturally appropriate for minorities and 23 There are numerous resources to assist States parties in this regard, such as UNESCO’s Guidelines for Curriculum and Textbook Development in International Education (ED/ECS/HCI). One of the objectives of article 13 (1) is to “strengthen the respect of human rights and fundamental freedoms”; in this particular context, States parties should examine the initiatives developed within the framework of the United Nations Decade for Human Rights Education - especially instructive is the Plan of Action for the Decade, adopted by the General Assembly in 1996, and the Guidelines for National Plans of Action for Human Rights Education, developed by the Office of the High Commissioner for Human Rights to assist States in responding to the United Nations Decade for Human Rights Education.