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[quote=Anonymous][quote=Anonymous][quote=Anonymous][quote=Anonymous][quote=Anonymous][quote=Anonymous][quote=Anonymous]There have been numerous posts on this board that attempt to adjust test average differences by using racial cohort data as a proxy for SES. This showed similar SES student cohorts at DCC schools performed similar (and sometimes better) than their W's counterparts. Having fewer students facing poverty does not necessarily mean higher achievement.[/quote]

Yes, you can totally get a sense of how one school stacks up to another by looking at SAT averages for similar SES cohorts. The data is available from MCPS at the link below, but the short-list is:

Blair 1326 
Walter Johnson 1275 
Wooton 1262 
Poolesville 1259 
Churchill 1257

These results are in line with the high-achiever data by MS which the county also published.

https://montgomeryschoolsmd.org/departments/sharedaccountability/reports/2017/1771102HS%20Princ_SAT%20Partic_Perf%20Class%20of%202017.pdf[/quote]

Use these figures with a caveat - Blair and Poolesville skim off students from other clusters attending the magnet programs and CAP.[/quote]

The small magnet at Blair is mostly Asian and has little impact on the averages of white students at school of 3000.[/quote]

While only ~22% (~660) of Blair as a whole is white, in the magnet it is ~30% (~120) and in CAP it is ~70% (~210). It may feel "truthy" to feel it has little impact, but the numbers tell a different story.[/quote]

Yes, there are  roughly 30 white kids in the stem magnet and the impact on their cohorts overall SAT average can be calculated. It’s been posted here many times.  It ends up giving Blair about 20 points which is still higher than any other HS in the county. Personally id include the magnet kids because their part of the larger Blair community. [/quote]

1. Just because something has been posted many times does not make it correct. Did you also believe the worst about comet pizza because it was posted many times on the internet?

2. Without any information about the relative performance between sub-groups, we can not calculate how much a particular sub-group pulled up or down the overall mean. If we need to know how much OOB white students contributed to the mean, we need to know how they performed relative to the rest of that population. If you have a source for the OOB white (magnet+CAP) students' performance, post it. Without that information, it is all pretty much hand-waving.

For what it is worth, I personally think these comparisons are silly - I know Blair non-magnet students can do very well and there are wonderful opportunities available to them; but trying to prove it using SAT averages where OOB and in boundary students are not separated is dishonest.[/quote]

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