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## Education Statistics > Assessments > Scale Score, Grade 8 Math (most recent) by state

DEFINITION: For each different subject, NAEP creates a scale score based on statistical procedures called item response theory (IRT). IRT is a set of statistical procedures useful in summarizing student performance across a collection of test exercises requiring similar knowledge and skills. All NAEP subject area scales are produced using these procedures. In Math and Reading, NAEP creates a scale ranging from 0-500. In Science and Writing, NAEP creates a scale ranging from 0-300.
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Rank   States  Amount
# 1     Massachusetts: 292
# 2     Minnesota: 290
= 3     North Dakota: 287
= 3     Vermont: 287
= 3     South Dakota: 287
# 6     Montana: 286
= 7     Wisconsin: 285
= 7     Washington: 285
= 7     New Hampshire: 285
= 10     Iowa: 284
= 10     Kansas: 284
= 10     Virginia: 284
= 10     New Jersey: 284
# 15     Ohio: 283
= 16     North Carolina: 282
= 16     Indiana: 282
= 16     Oregon: 282
= 16     Wyoming: 282
= 20     Idaho: 281
 = 20 Connecticut: 281 = 20 Pennsylvania: 281 = 20 Delaware: 281 = 20 Maine: 281 = 20 Colorado: 281 = 20 Texas: 281 = 20 South Carolina: 281 # 28 New York: 280 = 29 Alaska: 279 = 29 Utah: 279 = 31 Illinois: 278 = 31 Maryland: 278 # 33 Michigan: 277 # 34 Missouri: 276 = 35 Kentucky: 274 = 35 Arizona: 274 = 35 Florida: 274 = 38 Arkansas: 272 = 38 Rhode Island: 272 = 38 Georgia: 272 = 41 Oklahoma: 271 = 41 Tennessee: 271 # 43 Nevada: 270 = 44 California: 269 = 44 West Virginia: 269 # 46 Louisiana: 268 # 47 Hawaii: 266 # 48 New Mexico: 263 = 49 Mississippi: 262 = 49 Alabama: 262 # 51 District of Columbia: 245 Weighted average: 277.7

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