Germany's PISA shock (2000)
Germany's first PISA results placed it below the OECD average in reading, math, and science. The mediocre showing triggered a national debate about education quality and led to major reforms.
Germany introduced national education standards, expanded all-day schooling, and increased early childhood education funding.
German PISA scores improved in subsequent cycles, showing that assessment-driven reform can work.
Shows how PISA results can drive policy change when they shock the public and policymakers.
