Average scale scores for grade 4 science, by class time spent on life 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	149	143	149	151
2009	Large city	125	127	136	137
2009	Atlanta	‡	‡	139	129
2009	Austin	‡	124	148	147
2009	Baltimore City	‡	111	120	126
2009	Boston	‡	136	143	141
2009	Charlotte	‡	131	151	150
2009	Chicago	‡	122	123	125
2009	Cleveland	‡	‡	113	116
2009	Detroit	‡	‡	106	113
2009	Fresno	116	121	125	119
2009	Houston	‡	128	135	137
2009	Jefferson County (KY)	‡	‡	148	151
2009	Los Angeles	‡	118	123	127
2009	Miami-Dade	‡	145	142	147
2009	Milwaukee	‡	116	128	130
2009	New York City	‡	133	132	139
2009	Philadelphia	125	116	123	124
2009	San Diego	‡	‡	144	144