Average performance of 15-year-olds in mathematics, reading, and science, OECD average

Assessed through PISA scales, which evaluate children's ability to use mathematical reasoning, understand and engage with texts, and interact with scientificconcepts for practical problem-solving, personal development, and informed citizenship.

Note: Initially, the average PISA score across subjects and all OECD countries was at 500 with a standard deviation of 100, so that most students scored between 400 and 600. Scores in latercycles were calibrated to remain comparable to this baseline.

Average performance of 15-year-olds in mathematics, reading, and science

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