2010 DC CAS Test Scores - Please check
http://www.nclb.osse.dc.gov/ for additional detail.
Deal
Reading: 83.1%
Math: 84.1%
(Each increased 5%+ between 2009 and 2010)
Deal SE population 8% of total, LEP 5% of total, Economically disadvantaged: 25% of total
Washington Latin MS
Reading: 82.8%
Math: 81.4%
(Change in Math 09-10, 82.0 to 81.4; change in Reading 09-10, 82.3 to 82.8)
Latin MS SE population 5%, LEP 4%, Economically disadvantage: 10% of total
One analysis: statistically insignificant difference, although for 2010 Deal did do better. Deal increased dramatically in both math and reading, although neither school made Adequate Yearly Progress (AYP). In size and composition, the schools are not the same, but they both manage to do really quite well (with room for improvement at both). In schools with good teachers and good students, the challenge resides in chipping away at that last 15-20 percent; both Latin and Deal will face this challenge equally.
Digression: One critical factor sometimes overlooked is comparing schools of different sizes. In DC, the threshold for reporting DC CAS data for AYP is 25 students. If a population of students in a school, say Asian/Pacific Islander, falls below that minimum threshold, then the scores for that school for the subpopulation are not broken out and are, therefore, not reported publicly. The intent is to prevent any possibility of identification by subgroup that might allow a reader to identify that student by name. DC has a relatively low threshold (25) whereas in other states it is much higher. This is one reason why some elementary schools might make AYP, but when those same students are aggregated with a larger number of students from other schools, the minimum threshold is reached and the middle school is held to account for more measures. Not complaining, just the way the law is written I believe. That is why it is important to check out how individual
grades do; while the whole school might miss out, the change between 6th and 8th grade (in the case of a DC middle school) can be helpful to provide a slightly more accurate read on AYP and performance.