Here's a chart with "gifted" (anchored at 95% by grade) and grade level medians.
http://www.nwea.org/assets/downloads/981/Placement%20Guidelines1.pdf

This is a pretty comprehensive source document with RIT to percentile conversion charts for each grade:
http://pickens.it.schoolfusion.us/m...ssionid=14d1e9266e4482d198ebc39c6e6bc9c3

Another important thing to consider is the growth profile. You'll see this if you ask for a copy of your son's NWEA Student Progress report.
http://www.powayusd.com/projects/ed...20Student%20Growth%20Report%20Sample.pdf
and
http://www.powayusd.com/projects/ed...udent%20Growth%20Report%20Sample%202.pdf


Last edited by inky; 04/27/09 02:45 PM. Reason: reworked first link