The PISA 2012 reports for England, Wales and Northern Ireland are available: PISA 2012 in the UK
PISA in Scotland
Around 120 schools in Scotland were invited to take part in PISA 2015. The PISA 2015 field trial took place in Scotland in March 2014 and the main survey happened in March 2015.
How are schools and students chosen to participate in PISA 2015?
What did students need to do?
Schools do not need to administer or collect the tests and questionnaires. A trained PISA administrator brings everything to the school and runs the session. All marking was done by NFER.