Although International Association for the Evaluation of Educational Achievement-pioneered international large-scale assessment (ILSA) of education is now a well-established science, non-practitioners and many users often substantially misunderstand how large-scale assessments are conducted, what questions and challenges they are designed to…

Overall objective of the test was to arrive at an internationally valid measuring instrument covering a wide range of content and objectives, such as measuring mathematical achievement, within which each country could find its own emphasis. (Author/RK)