Hello lucouhu
I am aware of the raw rit scores and percentiles for the different grades. My child has always tested at 99+ percentile. The Rit score does fluctuate a great deal especially for gifted children. I was trying to get across that my experience is that these tests are not always that accurate and one child can go up or down by 10-15 points every 3 months or so. The company NWEA admits that they are not sure of the accuracy after the 245 RIT and does not say what the ceiling RIT score is for this test. I would not be too concerced if my 1st grader did poorly on 1 or 2 of these tests as long as they are progressing year after year. Lastly parents need to provide appropriate reading material for their gifted children because I have found that schools will not.