OECD - PISA 2018 results.
OECD - United Kingdom overview.
BBC News - Pisa tests: UK rises in international school rankings.
The Guardian - British schoolchildren among least satisfied, says OECD report.
OECD - PISA Results 2018: Insights and interpretations.
FFT Education Datalab - Nine key findings from PISA 2018.
NFER - PISA 2018 National Reports.
DfE - PISA 2018: national report for England.
DoE - PISA 2018 Achievement of 15-year-olds in Northern Ireland.
Scottish Government - Programme for International Student Assessment (PISA) 2018: Highlights from Scotland’s results.
TES - Pisa 2018 results reveal a mixed picture for Scotland.
WalesOnline - New international Pisa schools tables show Wales remains behind other UK nations but is improving.