Scores on the Iowa Assessment can be compared with scores earned by a nationally representative sample of students who took the test (the norm group). The Iowa Assessment score that reflects this comparison is called a national percentile rank (NPR). If a student’s national percentile rank in Reading is 62, then the student scored as well as or higher on this subtest than 62% of his/her same-grade peers in the national norm group. The percentile ranks range from 1 to 99. The national average in all subtests is 50%.
Other scores received from the Iowa Assessment may include:
- Scale scores (total score received for the subtest)
- Raw scores (number of questions the student answered correctly)
- Grade equivalent scores (number that describes the student’s location on an achievement continuum of grades and months, at which the typical student receives the scale score)
- Number attempted (the number of items the student answered)
Score reports generally contain a narrative that helps with understanding and/or interpreting the score results.