The work analyzes public-private relations in the construction of educational policies in the State of São Paulo and from the State of São Paulo in the case of the Secondary School Reform (NEM). For this, we adopted references on governance networks, neoliberalization, and heterarchization of the State, understanding that the elaboration of policies and the provision of public services are increasingly shared between public and private actors, constituting a network governance arrangement. The state bureaucracy is replaced by relationships of interdependence and overlap between the public and the private, constituting a heterarchical organization. Using the methodology of network ethnography, an analysis tool that enables the representation of policy networks in the form of graphs, we map some of the most recent forms of privatization of education in the State of São Paulo: 1) the partnership between the Secretary of Education of the State of São Paulo (Seduc-SP) and the Associação Parceiros da Educação (APE) around the  Program Education – Commitment of São Paulo, between 2015 and 2018; 2) the implementation of the São Paulo NEM, based on partnerships related to the Inova Educação Program and the Currículo Paulista between 2019 and 2022; and 3) the mobility of educational policy, from the São Paulo NEM, in the federative context of NEM implementation in the rest of the country.