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[quote=Anonymous][quote=Anonymous]If only 39,000 fifth graders in the entire country are scoring above 524 in math, and only 78,000 score above 520, do you not see how it is statistically impossible for 100 Fairfax kids to have a 564?

Tigermoms roam everywhere.   If using SD, back of the envelope calculation says there would be fewer than 1,000 kids scoring above a 536 in the ENTIRE country.  Yet Fairfax has 100 scoring 24 points HIGHER.

Egads.  Stop. Stop. Stop.[/quote]

Oh FFS.  Are you just not comprehending all of the previous posts about issues with the norming group?  I mean, seriously?  For the millionth time, no one here is saying that FCPS has 20% of the 99th percentile scorers in the country.  What has been argued is that the norming group is not likely to be inclusive of high or low end outliers in the first place, so the high and low ends of the curve are not going to be accurate.  This is the case also for the CogAT and NNAT.  The tests will end up with like 3-5% of the kids earning scores above the 99th percentile cutoff score of the norming group.

They also can't norm for kids high into the 99th percentile.  There is no reason for any gifted, magnet, private, or homeschool programs to administer iready at all or agree to be in any sort of norming population, since the test will give them no useful information.  They simply are not going to have data for outliers.

30-40 points above the 99th percentile cutoff by iready terms corresponds to placement in math classes 2 grade levels higher.  That's honestly not that rare, and being two grade levels ahead would not correspond with the 99.99th percentile, as you are suggesting.  99.99th percentile kids in 5th grade are in like Algebra II.  They wouldn't be appropriate placed in "7th grade math", which is where iready charts place them.

In this thread, there is a poster who says that her kid scored in the 30-40 points above the 99th percentile cutoff.  That poster also said that their kid isn't a prodigy, is taking outside math classes, and loves math.  You should believe that person when they say that their kid is not a 99.99th percentile kid, and that such scores are achievable in FCPS.  [/quote]

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