How are countries chosen to participate in PISA?
Countries who are interested in participating in PISA contact the OECD Secretariat. The PISA Governing Board then approves membership according to certain criteria. Participating countries must have the technical expertise necessary to administer an international assessment and must be able to meet the full costs of participation. To take part in a cycle of PISA, countries must join two years before the survey takes place. For example, all countries participating in PISA 2009 will have joined before March 2007.
