What is a RIT score?
The term RIT score is short for Rasch Unit, a scoring scale named for Georg Rasch, a Danish mathematician. The scale is continuous from 0 to infinity (most scores range in the 150 to 300 range) with equal intervals between score points across the full range. The continuous scale means that a student who improves by 10 points between 3rd and 4th grades (moving from 204 to 214) has improved just the same as a student who improves by 10 points between 5th and 6th grades (moving from 219 to 229). This equal interval feature makes measuring growth of individual students easy and reliable. The RIT scale is typical of what is used by the SAT and ACT college entrance examinations and the National Assessment of Educational Progress (NAEP).
