Do Countries with High Mean Performance in PISA Maintain their Lead as Students Age?
OECD. Organisation for Economic Cooperation and Development
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Countries where 15-year-old students perform at high standards internationally tend to be the same countries where these young adults tend to perform well at the age of 26 to 28. School systems need to ensure that their students perform at a high level by the time they complete compulsory schooling and that these skills are maintained and further developed thereafter.