The UIS’ goal, as custodial agency for reporting against the SDGs, is to develop reporting scales that will support national governments to effectively measure and monitor student learning outcomes in mathematics and reading against SDG Indicator 4.1.1 over time, and to utilize the data for making informed policy decisions. It is a further goal to support the use of existing national assessments (NAs) and cross-national assessments (CNAs) to facilitate measurement and reporting of learning outcomes, rather than requiring a single assessment be used by all countries for SDG reporting purposes. The Global Alliance to Monitor Learning (GAML) and its technical partner, Australian Council for Educational Research’s Centre for Global Education Monitoring (ACER-GEM), are exploring the development of reporting scales – the UIS Reporting Scales, or UIS-RS – that would achieve these goals. Draft learning progressions have been developed and are currently undergoing broad review, and a proposal for validating the scales has been put forward for consideration. There is broad support for continuing the work to explore the development of these reporting scales, but also recognition that this is a longer-term effort.