education due to discrimination preventing access to education. Discrimination occurs most prominently in terms of accessing education. For example, girls can face gender-based barriers such as child marriage, pregnancy, and gender-based violence which often prevent them from going to school or contribute to them dropping-out of school. People with disabilities often face literal accessibility issues, such as a lack of ramps or insufficient school transportation, making it more difficult to get to school. Migrants often face administrative barriers that prevent them from enrolling, effectively barring them from education systems. However, discrimination also occurs within education systems when certain groups receiving an inferior quality of education compared with others, for instance, the quality of education in urban schools tends to be higher than that found in rural areas. Discrimination also happens after education where different groups of people are less likely to draw the same benefits from their schooling. For example, educated boys tend to leave school with higher wage potential than equally educated girls. Non-discrimination and equality provisions found in international human rights law (IHRL) exist to ensure that the principle that international human rights are universal is applied in practice. Non-discrimination and equality are not abstract concepts under international human rights law (IHRL). They are elaborated human rights that have been developed over decades to address the discrimination that people face daily. Particularly education where the rights to non-discrimination and equality have been applied to the right to education across numerous human rights treaties, including one dedicated to the issue, known as UNESCO CADE. Despite the strength of non-discrimination and equality law, eliminating discrimination and inequalities is a challenge that individual states and the international community face. This was acknowledged in 2015 when the international community vowed to ‘leave no one behind’. International and regional human rights treaties apply the rights to non-discrimination and equality to the right to education of specific marginalised groups. Marginalized groups are those who have suffered prolonged and historical discrimination, usually, but not exclusively, on the basis of identity (gender, for example), characteristics (ethnicity, race), or circumstance (refugees, migrants, internally displaced persons). Marginalized groups are very likely to be subject to multiple, compound, or intersectional forms of discrimination. Examples of marginalised groups include: girls and women national, ethnic, and linguistic minorities people with disabilities indigenous people migrants refugees asylum-seekers stateless persons internally displaced persons (IDPs) persons in detention / persons deprived of liberty people