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	1	17	62
1 Austin	Austin	x	0	1	15	61
2 Jefferson County (KY)	Jefferson County (KY)	<	0	2	14	57
3 Charlotte	Charlotte	<	1	4	11	52
4 Houston	Houston	<	2	3	11	49
5 San Diego	San Diego	<	2	3	11	49
6 Miami-Dade	Miami-Dade	<	2	3	11	49
Large city	Large city	<	6	1	11	44
7 Boston	Boston	<	6	1	9	39
8 New York City	New York City	<	6	4	6	38
9 Fresno	Fresno	<	7	4	5	34
10 Los Angeles	Los Angeles	<	7	6	3	33
11 Atlanta	Atlanta	<	7	6	3	33
12 Chicago	Chicago	<	8	6	2	29
13 Milwaukee	Milwaukee	<	9	5	2	28
14 Cleveland	Cleveland	<	11	4	1	26
15 Philadelphia	Philadelphia	<	9	7	0	25
16 Baltimore City	Baltimore City	<	14	2	0	20
17 Detroit	Detroit	<	13	3	0	20
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.