????? ????? ?? ????? ????? ( ??????? : Secondary school) ??? ????? ?? ?? ????? ????? ????? ???? ?? ?? ?? ????? ???? ?? ?? ????? ?? ???? ???

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???? ????? ?? ????? ????? ?? ????? ???? ? ???? ???? ?????? ?????

• Australian CensusAtSchool (Australia) ??????? ??? (Date missing) ?????? abs.gov.au (Error: unknown archive URL)
• Canadian Education Statistics Council (CESC) (United States)
• Office for National Statistics (ONS) (United Kingdom)
• BB103_Area_Guidelines_for_Mainstream_Schools (2014) UK ??????? ??? (Date missing) ?????? gov.uk (Error: unknown archive URL)
• National Center for Education Statistics (NCES) (United States)
• OECD Standardised designs (2011)