Average scale scores for grade 4 science, by class time spent on physical 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	143	142	149	152
2009	Large city	125	125	136	140
2009	Atlanta	‡	‡	140	129
2009	Austin	‡	136	149	145
2009	Baltimore City	116	113	123	117
2009	Boston	136	132	143	147
2009	Charlotte	‡	135	152	150
2009	Chicago	‡	113	124	126
2009	Cleveland	‡	108	114	115
2009	Detroit	‡	‡	111	112
2009	Fresno	113	122	125	119
2009	Houston	‡	128	134	138
2009	Jefferson County (KY)	‡	‡	147	152
2009	Los Angeles	‡	116	123	129
2009	Miami-Dade	‡	145	143	146
2009	Milwaukee	‡	121	127	131
2009	New York City	124	133	134	139
2009	Philadelphia	‡	113	122	129
2009	San Diego	‡	‡	142	144