How are the Iowa Assessments® and the Iowa Tests of Basic Skills® (ITBS®) Scored?
The ITBS® and the Iowa Assessments® are scored based on your child’s age as well as the current month and grade level when the test is administered.
Here are some of the scores you will see on your child’s Iowa score report:
Standard Score (SS) or National Standard Score (NSS). The raw scores for each subtest are converted to Standard Scores that range from 80 to 400. A Standard Score indicates each student’s placement along an achievement continuum. Students fall within one of three categories for each subject: Not Proficient (NP), Proficient (P) or Advanced (A). CLICK HERE to see a report on standards scores and interpreting proficiency on the Iowa Assessments® and the ITBS®. The expectation for proficiency has remained the same from the old ITBS® to the new Iowa Assessments®.
Grade Equivalent (GE) or National Grade Equivalent (NGE). Grade Equivalent scores represent what the average student in the indicated level might score on the ITBS. Scores range from K.0 to 13+, with the first letter or number indicating current grade (K = Kindergarten, 1 = 1st grade, etc.) and the following decimal indicating a particular month in that school year. Example: 1.7 means the seventh month of 1st grade. The Grade Equivalent scores help administrators compare each child’s learning progress over time.
National Percentile Rank (NPR). Each student’s National Percentile Rank score is calculated by comparing test performance against others within the same age range and grade level. A score in the 90th percentile means your child scored better than 90% of students on the Iowa test. Percentile rankings range from 1-99; the average rank in the U.S. is 50th percentile.
CLICK HERE to see an explanation of the information on your child’s Iowa Assessments® score report.