What Does RIT Mean
MAP Growth uses the RIT (Rasch Unit) scale to help you measure and compare academic growth. Specifically, the scale measures levels in academic difficulty. The RIT scale extends equally across all grades, making it possible to compare a student's score at various points throughout his or her education.
What does a specific RIT score mean? It represents the level where a student is ready to learn, also known as the Zone of Proximal Development. The test finds that level by pinpointing where a student would just as likely answer incorrectly as correctly, the point between knowing and not knowing answers.
In addition to RIT scores, MAP Growth provides specific learning statements showing what each student is ready to learn. Those learning statements are directly aligned to your state standards.
As standards change, NWEA makes new alignments so that RIT scores and learning statements still maintain the same meaning in terms of academic difficulty. Those changes result in new test versions, but the new versions will not significantly impact student scores, growth measurements, nor the ranking against NWEA norms.
However, it is possible that the introduction of new standards into MAP tests do impact the Instructional Areas (or "goal areas") that appear on MAP reports. For this reason, the best practice is to adopt new tests at the start of your academic year, not mid-year.
Relation to Instruction
There are multiple tools to help you relate RIT scores and learning statements to your instruction. For common ideas, see Plan Instruction.