Average score of 15-year-old students on the PISA science scale. In PISA 2006 the mean science score for OECD countries was initially set at 500 points (for 30 OECD countries), then was re-set at 498 points after taking into account new OECD countries. Data reflects country performance in the stated year according to PISA reports, but may not be comparable across years or countries.

    Source: Our World in Data