The relevant international and regional human rights treaties include: Convention on the Elimination of All Forms of Discrimination against Women (and its Optional Protocols) International Covenant on Economic, Social and Cultural Rights (and its Optional Protocols), Convention on the Rights of the Child, and UNESCO Convention against Discrimination in Education.
In Europe: Protocol 1 to the European Convention on Human Rights, and (Revised) European Social Charter (including Article 17)
In the Americas: Charter of the Organization of American States, American Convention on Human Rights Protocol of San Salvador.
In Africa: Protocol to the African Charter on Human and Peoples’ Rights on the Rights of Women in Africa, African Charter on Human and Peoples’ Rights, and African Charter on the Rights and Welfare of the Child
The international human rights treaties relevant to the right to education of girls and women ratified by the State provide a normative framework for the human rights commitments of the State regarding its obligations to implement the right to education of girls and women.
It may also be worth checking whether reservations or declarations have been made which limit the domestic applicability of relevant provisions
For information on ratification status see, here