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[quote=Anonymous][quote=Anonymous]Does any know what a child has to score to be proficient?[/quote]

My understanding - but someone please correct me! - is that it's measured in quartiles based on the actual distribution of student scores (of all DC public and charter school students at that grade level). By asking what score is deemed proficient, you're actually asking what score does the median student have this year. The 50% of students above that score are deemed "proficient", the top 25% of which "advanced". The 50% of students below that score are deemed "basics" or "below basics". Ever seen a boxplot? That's it. So the cutoffs are empirical figures that change with every test. You can easily derive that they get harder to reach when all students get better or better students arrive in the mix.
And just so you don't get your hopes up, the kind of question your asking here, about distributions, likelihoods and such, or versions thereof can well be found on 4th or 5th grade DC-CAS tests...[/quote]

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