What is a "RIT" Score?
When a student completes an ISAT test, he or she receives a series of RIT scores as a result. So, what is a "RIT" and what do the scores mean?
"RIT" is an abbreviation for "Rausch Unit." The difficulty and complexity of each ISAT test question is measured using the RIT scale. A student's RIT score indicates that the student was answering questions correctly 50% of the time at that level of difficulty.
Distinguishing Features of RIT Scores:
- RIT Scores Indicate a Student's Instructional Level
- The student's RIT score indicates the level of questions that the student was answering correctly 50% of the time. These are the skills that the student should be working on right now. DesCartes: A Continuum of Learning match specific skills to RIT scores, so instruction can be planned at an appropriate level for each student.
- The RIT Scale is an Equal Interval scale
- The RIT scale in consistent, just like a ruler. One inch is always one inch, and one RIT is always one RIT. A student who grows from 165 to 170 shows the same amount of instructional growth as a student who goes from a 280 to 285 -- 5 RIT points of growth.
- Because the RIT score is consistent, it can be used to accurately measure a student's growth over a period of time.
- RIT Scores are Completely Independent of Grade Level
- There are "typical" RIT scores for each grade level, but every student is different. The RIT scale allows for students to be accurately measured regardless of their grade level.
- If a 3rd grade student earns a 210 on the Reading ISAT, and a 8th grader also earns a 210 on the Reading ISAT, these two students are at the same instructional level.
What RIT Scores might I see for my students?
- As a teacher it is helpful to have a general idea of what RIT scores are typical for Math, Reading, and Language Usage for the grade level of your students.
- Keep in mind that these scores are averages. You would not want to use these numbers to set goals or expectations for your students, but they provide some perspective about how each student, or the class as a whole, is performing.
What amount of RIT score growth is "normal"?
- Every student is unique, but we can look at the results from NWEA's norm study to get an idea for how much RIT growth a student might show over a year.
- Generally speaking, students starting with a lower RIT score tend to show greater amounts of growth, and students starting with a higher RIT score tend to show less growth. (The most important thing? All students can grow!)
- NWEA provides growth targets for individual students based on their grade level and RIT score for each subject. These targets can be very useful for goal-setting with students. Taget growth is available on the Student Goal Setting Worksheets (in the Dynamic Reporting Suite on reports.nwea.org) and on the Achievement Status and Growth Report, available through your administrator.
Material from DesCartes: A Continuum of Learning is provided by courtesy of Northwest Evaluation Association and may not be republished, rewritten, or redistributed. All rights reserved.