Every year, through initiatives such as KIESE and the Torino Process, the European Training Foundation (ETF) collects data to monitor policy and system performance, as well as trends in education, skills and employment across its 29 partner countries in south-eastern and eastern Europe, the southern and eastern Mediterranean and central Asia. These intelligence-gathering efforts culminate in the annual release of a flagship cross-country monitoring report which offers insights into national, regional and international developments in key areas of policy and practice. The cross-country report is complemented by country monitoring reports for each ETF partner country and, starting in 2024, by thematic monitoring reports which focus on a single theme or type of data in the ETF monitoring framework across all countries. ETF partner countries through the lens of PISA is the first thematic report in this intelligence and monitoring series. It presents key results from the analysis of PISA data included in the broader monitoring framework of the ETF. The report covers all 16 ETF partner countries that participated in the 2022 round of the OECD assessment and presents insights about the characteristics of their student populations in PISA, the learning outcomes of students, as well as the factors that correlate with and may influence student performance in the three PISA domains: mathematics, reading and science.