Average scale scores for grade 4 science, by class time spent on earth and space science and jurisdiction: 2009
Year	Jurisdiction	None	Little	Some	A lot
Year	Jurisdiction	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	147	145	149	152
2009	Large city	125	129	136	140
2009	Atlanta	‡	‡	139	130
2009	Austin	‡	122	146	149
2009	Baltimore City	‡	116	121	117
2009	Boston	132	139	144	146
2009	Charlotte	149	143	151	146
2009	Chicago	117	116	123	129
2009	Cleveland	‡	109	115	114
2009	Detroit	‡	108	109	112
2009	Fresno	112	123	125	117
2009	Houston	‡	124	134	138
2009	Jefferson County (KY)	‡	134	146	155
2009	Los Angeles	‡	115	123	128
2009	Miami-Dade	‡	140	142	149
2009	Milwaukee	‡	119	128	128
2009	New York City	129	136	134	138
2009	Philadelphia	122	116	122	128
2009	San Diego	‡	‡	143	143