Hi, readers. MAP percentile scores are based on the subject's grade and time of year that the test is given. That is, there is a raw score (the 265, 235, 240 etc., called a "RIT score"), which is turned into a percentile score based on grade level/time of test. This makes sense, because reading at a top 2nd grade level doesn't say much for a 5th grader.

Here's a very abbreviated score chart to show you what I mean:
http://www.bismarck.k12.nd.us/uploads/resources/1475/2008-hiloav.pdf

Here's the full set of charts:
http://pickens.it.schoolfusion.us/m...File/MAP/Norms2008.pdf?sessionid=0f88735

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