This presentation shows staying with MAP for primary grades until they have a RIT of 210. The benefit of switching sooner is you would have a more consistent baseline for measuring future growth instead of wondering if any changes are due to the different test.
http://www.casdk12.net/Stone's%20We...WEA%20-%20APS%20Aug%2028,%202007.ppt Choosing Appropriate Test
* Refer to prior data gathered on the student
* Discuss with prior teacher
* Pre-requisite test until the student has attained all foundational skills
* Skills test until the student has attained all foundational skills
* MAP for Primary Grades until they obtain a RIT score of 210 or no longer need the audio support