Taking the United Nations' Sustainable Development Goal 4 (SDG4 - quality and equity in education and lifelong learning opportunities for all by 2030) as a global education policy, this article investigates the accompanying consensus politics. It shows how political consensus among 193 UNESCO member states over the national implementation of SDG4 indicators was convened into a measurable commitment to the production, utilisation, and sharing of education data, a technical one. It argues that, the Technical Cooperation Group (TCG), a political Initiative from the UNESCO Institute for Statistics (UIS), made instrumental use of indicators (thus data) to formulate and put into practice a global set of policy values dubbed collectively here as experimentality. Experimentality being inherently topological (working in spatiotemporal configurations), these values helped TCG think and act in topologically reflexive ways. That is, they enabled the formulation and putting into practice of spatiotemporal frames critical to bringing the global and the national together into collaborations for SDG4. Advancing the cross-disciplinary notion of experimentality and a topological semiotic approach to policy culture, this paper adds a value-focused perspective to the mobilities research on global education policy. A large corpus of web materials made official by TCG constitutes the empirical basis.