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PIRLS (Progress in International Reading Literacy Study)

An international study of reading at grade 4, run by the IEA every five years.

Stands for
Progress in International Reading Literacy Study
Used in
International
Topic
Assessment

Being checked against official sources. This definition is written in our own words; always check the official guidance for your country.

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PISA (Programme for International Student Assessment) International
An OECD study every three years testing 15-year-olds in reading, maths and science across many countries.
TIMSS (Trends in International Mathematics and Science Study) International
An international study of maths and science achievement at grades 4 and 8, run by the IEA every four years.

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Definitions are written by Classfern in our own words for teachers in the UK and the US. They are short explanations, not legal or official definitions: always check the official guidance for your country, nation or state. Classfern is not affiliated with or endorsed by any government department, inspectorate or exam board named here.