following characteristics: Availability, Accessibility, Acceptability, and Adaptability. Specifically, regarding accessibility, it includes three aspects: 1. Non-Discrimination: Education must be accessible to everyone, particularly to members of the most disadvantaged groups, without discrimination in law or in fact on any prohibited grounds. 2. Physical Accessibility: Education must be within safe physical reach, either by being geographically accessible (e.g., within a reasonable distance) or accessible via modern technology (e.g., distance learning). 3. Economic Accessibility: Education must be affordable for all. Affordability is grounded in the provisions of Article 13(2) of the ICESCR, which mandates that primary education be free and compulsory, while secondary and higher education should be progressively made free. General Comment No. 13, Paragraph 19, distinguishes between secondary and higher education by noting that secondary education should be "widely available and accessible," while higher education does not need to be as widely available but should offer equal opportunities based on ability. Paragraph 34 of the General Comment further clarifies that the principle of non-discrimination, as recognized in Article 2 of the CRC and Article 3(5) of the UNESCO Convention against Discrimination in Education, applies to all school-age children residing in the territory of the State Party, including foreign children, regardless of their legal status. 2. CRC Article 28 of the CRC focuses on the obligation of contracting States to establish an educational system and ensure children's participation in education. It emphasizes that the right to education should be progressively realized on the basis of equal opportunity, with commitments to, "(a) Make primary education compulsory and available free to all; (b) Encourage the development of different forms of secondary education, including general and vocational education, to make it accessible to every 19