Order		Cross- jurisdiction significant difference	Number of Jurisdictions Significantly			All students percent at or above Basic
			higher	not different	lower	2009
			higher	not different	lower
National public	National public	>	0	2	16	71
1 Charlotte	Charlotte	>	0	4	12	70
2 Jefferson County (KY)	Jefferson County (KY)	>	0	4	12	70
3 Miami-Dade	Miami-Dade	>	0	5	11	66
4 San Diego	San Diego	>	0	5	11	65
5 Austin	Austin	>	0	5	11	65
6 Boston	Boston	>	2	3	11	62
7 New York City	New York City	x	6	1	9	56
Large city	Large city		7	2	9	56
8 Houston	Houston	x	6	2	8	55
9 Atlanta	Atlanta	<	7	1	8	52
10 Los Angeles	Los Angeles	<	9	3	4	45
11 Milwaukee	Milwaukee	<	9	4	3	44
12 Chicago	Chicago	<	9	4	3	44
13 Fresno	Fresno	<	9	5	2	38
14 Philadelphia	Philadelphia	<	10	3	3	38
15 Baltimore City	Baltimore City	<	13	3	0	31
16 Cleveland	Cleveland	<	14	2	0	30
17 Detroit	Detroit	<	14	2	0	26
NOTE: National public and Large city are not included in sorting the jurisdictions. Score differences are calculated based on differences between unrounded scores.
SOURCE: U.S. Department of Education, Institute of Education Sciences, National Center for Education Statistics, National Assessment of Educational Progress (NAEP), 2009 Science Assessment.