The UIS was commissioned jointly by the OECD and the World Bank to assess the current status of data collection and availability, at national education system level, in six PISA-D participating countries. The UIS’s role in this work was agreed with the other partners in the PISA-D project (as represented in the project’s International Advisory Group), the OECD and the World Bank. This report therefore responds to three key questions on the collection, availability and quality of system-level data and metadata for Cambodia, Ecuador, Guatemala, Paraguay, Senegal and Zambia.