Order		Cross- jurisdiction significant difference	Number of Jurisdictions Significantly			All students average scale score
			higher	not different	lower	2009
			higher	not different	lower
1 Charlotte	Charlotte	x	0	2	14	150
2 Jefferson County (KY)	Jefferson County (KY)	x	0	2	14	150
National public	National public		0	3	15	149
3 Austin	Austin	x	0	4	12	147
4 San Diego	San Diego	<	2	2	12	144
5 Miami-Dade	Miami-Dade	<	2	2	12	144
6 Boston	Boston	<	5	1	10	139
7 New York City	New York City	<	6	2	8	135
8 Houston	Houston	<	5	3	8	135
Large city	Large city	<	7	3	8	135
9 Atlanta	Atlanta	<	6	2	8	134
10 Milwaukee	Milwaukee	<	9	3	4	126
11 Chicago	Chicago	<	9	4	3	125
12 Los Angeles	Los Angeles	<	9	4	3	124
13 Fresno	Fresno	<	9	5	2	121
14 Philadelphia	Philadelphia	<	10	4	2	121
15 Baltimore City	Baltimore City	<	12	3	1	117
16 Cleveland	Cleveland	<	14	2	0	114
17 Detroit	Detroit	<	15	1	0	111
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.