PISA data show 80-point learning gap between rich and poor students

OECD PISA results reveal a persistent ~80-point achievement gap between the richest and poorest student quartiles in math, science, and reading, underscoring deep socio-economic inequality in education. The OECD recommends a return to basic content, but the data reflect structural disparities that policy responses have yet to address. This matters because education gaps drive long-term economic mobility and productivity.