Hello Loy58, I don't have any links for you right now re: whether there are gifted growth charts, but I some of my personal opinions about MAP and growth. When dealing with GT kids, the MAP seems like a great tool in elementary, particularly the lower grades. Once your kiddo starts getting very high scores on the 2-5 test, you'll want to request that they are given the 6+ version, as there will be more higher level questions.
I think the growth for GT kids may at times be lower than the average, as they're already ahead and need to be exposed to new things to get further ahead. Many kids will continue to learn through osmosis and continue to get good growth on the MAPs, and I'm sure some schools will try to challenge the kids more if they get crazy high MAPs. But many schools don't pay a lot of attention to the MAP scores. As a gifted student goes into higher grades, they will start hitting the ceilings of the test and the data will not be useful. You may want to do some talent search tests if you are having ceiling issues, so you can get good information from an above-level test.
Personally, if I see that my kiddo is still getting scores in the same percentile, and still getting some sort of increase in RIT score, then that's good enough.
Also, remember that if your kid is 99th percentile for grade, you'll want to check the charts in appendix B in the link below. Hitting the number at grade level that is the lowest for 99th percentile is quite different from hitting a much higher number, which may put you at high percentiles several grades up.
The appendices below have
http://www.nwea.org/sites/www.nwea.org/files/resources/NWEA%202011%20Norms%20Report_01.17.2012_2.pdfOK, I'm feeling like I just gave a bunch of really vague info. Sorry! Someone else will hopefully post some more concrete info.
