Order		Cross- jurisdiction significant difference	Number of Jurisdictions Significantly			Eligible percent at or above Basic
			higher	not different	lower	2009
			higher	not different	lower
1 Houston	Houston	x	0	3	13	44
National public	National public		0	4	14	43
2 Austin	Austin	x	0	4	12	41
3 Jefferson County (KY)	Jefferson County (KY)	x	0	5	11	40
4 Miami-Dade	Miami-Dade	x	0	4	12	40
Large city	Large city	<	5	4	9	34
5 Charlotte	Charlotte	<	1	8	7	34
6 New York City	New York City	<	4	4	8	33
7 San Diego	San Diego	<	3	6	7	33
8 Boston	Boston	<	4	8	4	31
9 Fresno	Fresno	<	4	8	4	28
10 Los Angeles	Los Angeles	<	5	7	4	28
11 Cleveland	Cleveland	<	7	7	2	26
12 Chicago	Chicago	<	7	7	2	25
13 Atlanta	Atlanta	<	7	7	2	25
14 Milwaukee	Milwaukee	<	10	5	1	22
15 Philadelphia	Philadelphia	<	10	6	0	20
16 Baltimore City	Baltimore City	<	13	3	0	17
17 Detroit	Detroit	<	14	2	0	16
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.