Iowa Test of Basic Skills

This is a norm referenced test which compares the performance of students with that of a national norming sample. The test measures reading, language arts, mathematics, science, and social studies, with several sub-tests in each area.

Scoring on the test is based on a normal distribution of scores generated by the original norming sample. Thus, each year, students who take the test are compared against students who were involved in the initial administrations that were used to set the scoring tables.

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