NWEA recently released updated norms, so a new collection of guidance documents should be in the offing. In the meantime, this alignment of math RIT scores to Common Core skills by grade level may be of interest. It was developed in conjunction with Khan Academy, which has a collaborative for using MAP scores to route to practice exercises, much like their arrangement with the SATs:
https://cdn.nwea.org/docs/MAP+Growth+Grades+6%2B+to+Khan+Academy.pdf
These are the new norms, which generally find that student achievement has declined a bit:
https://teach.mapnwea.org/impl/MAPGrowthNormativeDataOverview.pdfhttps://teach.mapnwea.org/impl/NormsTables.pdfHere's a linking study from TX on algebra end-of-course predictions based on NWEA MAP:
https://www.nwea.org/content/uploads/2020/07/TX-EOC-MAP-Growth-Linking-Study-Report-2020-07-24.pdf(concluded that RIT 240 was approximately equivalent to algebra I proficiency)
And user norms for high school math courses:
https://teach.mapnwea.org/impl/CSNormsOverview.pdfCheck the 50th %ile for spring for an approximation of end-of-course expected RIT.