Reply to MCPS percentiles based on current school and not county or home school?

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Reply to "MCPS percentiles based on current school and not county or home school?"

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[quote=Anonymous][quote=Anonymous][quote=Anonymous][quote=Anonymous]"My child's national verbal percentile was 97% and MCPS percentile was 78%. That seems like a large swing. The difference in quantitative was smaller - 99% national and 92% MCPS. The nonverbal was overall lower but also a large spread 79% and 49%

So yes, it can be a big change between national and MCPS percentiles."

Wow, that IS a big spread! Your child is in the top 3% nationally for verbal - and isn't even the top 20% in MoCo.. Really eye-opening.
I wish MCPS did the same last year for CES admissions other than just sending around rejections in the letter that also stated 99% test scores in all categories; it could have saved us a lot of frustration if we knew how our child performed in comparison to other MoCo applicants. 
[/quote]

That's not what MCPS percentile means, though I think they choose that misleading label on purpose to cause us to think like you outline.

It's really a "special calculation" percentile.  All the rest of this thread explains it.  The actual difference between a 99% national CoGat and MoCo CoGAT is never revealed.  Partly because all MCPS students don't take the CoGAT in 5th.   [/quote]

Right.  It seems like the MCPS % means that the child was in the 78th percentile of all MCPS students within the same poverty "band" who were selected to take the test for consideration for magnet programs.  So it not only includes only your school's SES "band" but it also does not include your performance relative to students who were not selected to take the test to be considered for the magnets (well, it includes like 377 of them whose parents overrode the MCPS recommendation and had them take the test).  But it is a measure of how your student compares within a relatively high performing MCPS cohort, which would give a read on whether your child is an "outlier" within the SES band or not.[/quote]

In case anyone left on this thread still interested in meaningful MCPS percentiles, I realized we do each have an example of the ACTUAL difference between MCPS Map scores and Nationally normed Map scores.  It's right there on the MAP reports under documents in my DC's MY MCPS Parent Portal.  Eyeball average of a number of test runs for two kids suggests  MCPS Map scores average between 5 and 10% higher than the national averages.  For last year and this fall.   That's by looking up the percentiles of the scores on the 2015 NWEA charts.[/quote]

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