Order		Cross- jurisdiction significant difference	Number of Jurisdictions Significantly			Eligible average scale score
			higher	not different	lower	2009
			higher	not different	lower
1 Jefferson County (KY)	Jefferson County (KY)	x	0	3	13	133
2 Houston	Houston	x	0	3	13	133
National public	National public		0	4	14	133
3 Miami-Dade	Miami-Dade	x	0	6	10	130
4 Austin	Austin	x	0	6	10	130
5 Charlotte	Charlotte	<	2	6	8	126
6 New York City	New York City	<	2	6	8	125
7 San Diego	San Diego	<	2	7	7	125
Large city	Large city	<	5	5	8	125
8 Boston	Boston	<	4	6	6	123
9 Cleveland	Cleveland	<	4	9	3	121
10 Atlanta	Atlanta	<	6	7	3	120
11 Fresno	Fresno	<	7	7	2	119
12 Los Angeles	Los Angeles	<	8	6	2	119
13 Chicago	Chicago	<	8	6	2	118
14 Milwaukee	Milwaukee	<	8	6	2	118
15 Philadelphia	Philadelphia	<	10	6	0	115
16 Baltimore City	Baltimore City	<	14	2	0	110
17 Detroit	Detroit	<	14	2	0	110
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.