Average scale scores for grade 4 science, by time per week on science instruction and jurisdiction: 2009
Year	Jurisdiction	Less than 1 hour	1-1.9 hours	2-2.9 hours	3-3.9 hours	4 hours or more
Year	Jurisdiction	Average scale score	Average scale score	Average scale score	Average scale score	Average scale score
‡ Reporting standards not met. NOTE: The NAEP Science scale ranges from 0 to 300. Some apparent differences between estimates may not be statistically significant. Analyze results with NAEP Data Explorer. SOURCE: U.S. Department of Education, Institute of Education Sciences, National Center for Education Statistics, National Assessment of Educational Progress (NAEP), 2009 Science Assessment.
2009	National public	138	143	150	151	152
2009	Large city	127	129	137	137	141
2009	Atlanta	‡	133	139	138	125
2009	Austin	142	129	150	150	145
2009	Baltimore City	116	113	119	118	127
2009	Boston	133	141	145	136	‡
2009	Charlotte	147	141	152	152	150
2009	Chicago	‡	112	127	123	126
2009	Cleveland	‡	114	115	117	113
2009	Detroit	‡	‡	‡	107	114
2009	Fresno	125	118	117	123	126
2009	Houston	‡	138	134	132	141
2009	Jefferson County (KY)	‡	‡	‡	144	152
2009	Los Angeles	115	120	128	123	128
2009	Miami-Dade	‡	145	147	143	142
2009	Milwaukee	‡	132	123	126	140
2009	New York City	134	136	134	132	137
2009	Philadelphia	‡	122	126	119	‡
2009	San Diego	‡	144	138	142	148