Indeed, the Sustainable Development Goals (SDGs) explicitly target learning. The goal 4.1 says: "By 2030, ensure that all girls and boys complete free, equitable and quality primary and secondary education leading to relevant and effective learning outcomes". This map shows the official report on one of the associated target indicators: the percentage of pupils at end of primary education achieving at least a minimum proficiency level in mathematics. As can be seen, data is available only for a minority of countries. And, as the subtitle in the chart notes, even in countries with available data there are issues with comparability.