Reply to How to read school CAS data

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[quote=Anonymous]Oh, and another thing (to complement my lengthy post above), look at the total number of students and whether roughly the same students are being tested. In small elementary schools, there are often very few children who are actually subject to the DC-CAS because the number of students in 3rd, 4th and 5th grade is only a small portion of the school population. Not only is that a shaky basis for prognosis for the other students, and of course especially so if the student body changes, but it also means the results fluctuate from year to year. Say, if the number of students tested is 50, then one single student scoring "proficient" vs. "basic", means a fluctuation of 2%. Five scoring into a different category makes the overall percentage go up/down by 10% etc.
Along similar lines, make sure you look at various "groups", especially how many special needs children there are. If there are a lot, then it may not be surprising to see many low scores. Although with accommodations, they're taking the same test.[/quote]

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