About the Assessment: Inclusion Rates

NAEP endeavors to include as many sampled students as possible in the assessment, including students with disabilities (SD) and English language learners (ELL), and has established specific inclusion goals: 95 percent of all sampled students and 85 percent of sampled students identified as SD or ELL. Inclusion rates were computed for each state/jurisdiction participating in the 2011 assessment and compared to NAEP inclusion goals. Specifically, Wilson confidence intervals were used in order to avoid having an upper bound greater than 1.

Three inclusion percentages were computed for each state/jurisdiction. An overall inclusion percentage represents included students as a percentage of all students sampled within the state/jurisdiction. In addition, separate percentages were computed to report included students as a percentage of the state/jurisdiction sample that was identified as SD or ELL.

Inclusion percentages are estimates based on a sample, and each estimate has a measure of uncertainty or margin of error. Confidence intervals quantify this uncertainty due to sampling, resulting in interval estimates of the inclusion percentages. Therefore, confidence intervals for inclusion percentages were used to determine upper and lower confidence bounds around the inclusion point estimates.

When determining whether each state/jurisdiction met the NAEP inclusion goals, the confidence intervals were used, rather than just the point estimates. In other words, if the inclusion goal, whether 95 percent or 85 percent, fell within the corresponding confidence interval, the state/jurisdiction was considered as having met the goal. Therefore, states/jurisdictions for which the upper bound of the confidence interval was less than 95 percent did not meet the overall inclusion goal.

In 2011, all states met the goal of including 95 percent of all students selected for the NAEP samples, and all but three states (Kentucky, Michigan, and North Dakota) met the goal of including 85 percent of those students identified as SD or ELL selected for the samples.

Read more about the NAEP inclusion policy, including exclusion rates from current and previous assessments in all subject areas.

National and State

Percentage of all students

Percentage of identified students

Inclusion rate and confidence interval in NAEP science for eighth-grade public school students, as a percentage of all students, by state/jurisdiction: 2011
State/jurisdiction	Inclusion rate		Lower	Upper
			95% confidence interval
Nation (public)	98	¹	98.2	98.4
Alabama	99	¹	98.4	99.3
Alaska	99	¹	98.5	99.2
Arizona	99	¹	98.4	99.5
Arkansas	99	¹	98.5	99.4
California	98	¹	97.6	98.7
Colorado	99	¹	98.5	99.4
Connecticut	99	¹	98.1	99.1
Delaware	98	¹	97.7	98.8
Florida	99	¹	98.3	99.1
Georgia	98	¹	97.7	98.9
Hawaii	98	¹	97.3	98.5
Idaho	99	¹	98.0	98.9
Illinois	99	¹	98.4	99.2
Indiana	99	¹	97.9	99.2
Iowa	99	¹	98.4	99.4
Kansas	99	¹	98.0	99.0
Kentucky	97	¹	96.5	97.9
Louisiana	99	¹	98.3	99.2
Maine	98	¹	97.5	98.7
Maryland	98	¹	97.4	98.6
Massachusetts	97	¹	95.8	97.6
Michigan	97	¹	96.5	97.9
Minnesota	98	¹	97.2	98.7
Mississippi	99	¹	98.7	99.4
Missouri	99	¹	98.1	99.2
Montana	98	¹	97.8	98.9
Nebraska	99	¹	98.0	99.0
Nevada	99	¹	98.0	99.2
New Hampshire	98	¹	97.2	98.4
New Jersey	99	¹	98.1	99.2
New Mexico	98	¹	97.7	98.7
New York	99	¹	98.0	99.1
North Carolina	98	¹	97.8	98.8
North Dakota	97	¹	95.9	97.5
Ohio	98	¹	97.0	98.5
Oklahoma	97	¹	96.1	97.9
Oregon	98	¹	97.7	98.9
Pennsylvania	99	¹	98.3	99.4
Rhode Island	99	¹	99.0	99.6
South Carolina	99	¹	98.2	99.2
South Dakota	99	¹	98.3	99.1
Tennessee	99	¹	97.7	99.1
Texas	98	¹	96.8	98.3
Utah	98	¹	97.6	98.6
Vermont	99	¹	98.1	99.0
Virginia	97	¹	96.1	98.2
Washington	98	¹	97.4	98.7
West Virginia	98	¹	97.8	98.8
Wisconsin	98	¹	97.2	98.7
Wyoming	99	¹	98.1	99.1
Other jurisdictions
District of Columbia	99	¹	98.0	98.9
DoDEA²	99	¹	98.1	99.1
¹ The state/jurisdiction's inclusion rate is higher than or not significantly different from the National Assessment Governing Board's goal of 95 percent. ² Department of Defense Education Activity (overseas and domestic schools). SOURCE: U.S. Department of Education, Institute of Education Sciences, National Center for Education Statistics, National Assessment of Educational Progress (NAEP), 2011 Science Assessment.

	Percentage of all students
State/jurisdiction	Identified	Excluded	Assessed	Assessed without accommodations	Assessed with accommodations
Nation	17	2	15	5	10
Nation (public)	18	2	16	5	10
Alabama	11	1	10	7	3
Alaska	—	—	—	—	—
Arizona	16	2	14	5	9
Arkansas	16	1	14	3	11
California	25	2	24	18	6
Colorado	17	1	15	5	11
Connecticut	16	2	14	3	11
Delaware	17	1	16	2	14
Florida	19	2	17	1	16
Georgia	13	1	12	2	10
Hawaii	18	2	17	6	10
Idaho	12	1	11	4	7
Illinois	16	1	15	3	12
Indiana	16	2	14	3	12
Iowa	16	1	15	2	12
Kansas	—	—	—	—	—
Kentucky	13	2	10	2	9
Louisiana	16	1	14	2	12
Maine	19	2	17	3	14
Maryland	14	3	12	1	11
Massachusetts	21	4	17	3	14
Michigan	15	2	12	3	9
Minnesota	17	2	15	6	9
Mississippi	10	1	9	2	7
Missouri	14	1	12	3	10
Montana	14	2	12	3	9
Nebraska	—	—	—	—	—
Nevada	17	1	16	5	10
New Hampshire	21	2	19	5	14
New Jersey	18	2	16	1	14
New Mexico	21	3	18	8	11
New York	20	2	18	1	17
North Carolina	17	2	15	3	13
North Dakota	16	4	12	3	9
Ohio	15	2	13	1	12
Oklahoma	18	3	14	4	10
Oregon	18	2	16	8	9
Pennsylvania	19	2	17	2	15
Rhode Island	21	3	18	4	14
South Carolina	16	2	14	5	9
South Dakota	12	1	10	3	7
Tennessee	12	2	11	1	9
Texas	17	4	14	7	7
Utah	14	2	12	4	8
Vermont	—	—	—	—	—
Virginia	17	2	15	4	11
Washington	14	2	12	4	7
West Virginia	15	2	14	4	10
Wisconsin	18	2	16	3	13
Wyoming	15	2	13	3	10
Other jurisdictions
District of Columbia	—	—	—	—	—
DoDEA¹	13	2	11	3	7
— Not available. ¹ Department of Defense Education Activity (overseas and domestic schools). NOTE: SD includes those identified under section 504. The national results include both public and nonpublic school students. The national (public) and state/jurisdiction results include public school students only. Detail may not sum to totals because of rounding. SOURCE: U.S. Department of Education, Institute of Education Sciences, National Center for Education Statistics, National Assessment of Educational Progress (NAEP), 2009 Science Assessment.

	Percentage of identified SD and/or ELL students
State/jurisdiction	Excluded	Assessed	Assessed without accommodations	Assessed with accommodations
Nation	11	89	30	59
Nation (public)	11	89	30	58
Alabama	12	88	61	27
Alaska	—	—	—	—
Arizona	13	87	30	57
Arkansas	8	92	19	73
California	7	93	70	23
Colorado	9	91	27	64
Connecticut	10	90	20	70
Delaware	8	92	9	83
Florida	9	91	8	83
Georgia	11	89	16	73
Hawaii	9	91	34	56
Idaho	10	90	33	57
Illinois	9	91	18	73
Indiana	13	87	17	70
Iowa	7	93	15	78
Kansas	—	—	—	—
Kentucky	19	81	14	67
Louisiana	9	91	15	76
Maine	8	92	18	73
Maryland	18	82	9	73
Massachusetts	17	83	15	68
Michigan	17	83	23	60
Minnesota	13	87	36	50
Mississippi	10	90	17	73
Missouri	9	91	21	70
Montana	14	86	21	65
Nebraska	—	—	—	—
Nevada	8	92	31	61
New Hampshire	10	90	24	66
New Jersey	12	88	8	80
New Mexico	15	85	36	49
New York	9	91	5	86
North Carolina	10	90	16	74
North Dakota	25	75	19	55
Ohio	15	85	8	76
Oklahoma	19	81	23	58
Oregon	9	91	43	47
Pennsylvania	8	92	13	79
Rhode Island	14	86	21	66
South Carolina	13	87	31	56
South Dakota	11	89	27	62
Tennessee	13	87	11	76
Texas	21	79	41	39
Utah	12	88	27	61
Vermont	—	—	—	—
Virginia	11	89	25	64
Washington	15	85	32	52
West Virginia	10	90	26	64
Wisconsin	12	88	16	72
Wyoming	10	90	21	69
Other jurisdictions
District of Columbia	—	—	—	—
DoDEA¹	16	84	26	58
— Not available. ¹ Department of Defense Education Activity (overseas and domestic schools). NOTE: SD includes those identified under section 504. The national results include both public and nonpublic school students. The national (public) and state/jurisdiction results include public school students only. Detail may not sum to totals because of rounding. SOURCE: U.S. Department of Education, Institute of Education Sciences, National Center for Education Statistics, National Assessment of Educational Progress (NAEP), 2009 Science Assessment.

	Percentage of all students
State/jurisdiction	Identified	Excluded	Assessed	Assessed without accommodations	Assessed with accommodations
Nation	12	2	11	2	9
Nation (public)	13	2	11	2	9
Alabama	10	1	9	6	3
Alaska	—	—	—	—	—
Arizona	12	2	10	2	7
Arkansas	12	1	11	2	9
California	9	1	8	3	5
Colorado	11	1	9	1	8
Connecticut	13	1	12	2	10
Delaware	15	1	14	1	13
Florida	15	1	14	1	12
Georgia	11	1	10	2	8
Hawaii	12	1	11	3	8
Idaho	9	1	8	3	5
Illinois	14	1	13	2	11
Indiana	14	2	12	1	10
Iowa	14	1	13	1	12
Kansas	—	—	—	—	—
Kentucky	12	2	9	1	8
Louisiana	15	1	13	2	12
Maine	17	2	16	3	13
Maryland	12	2	10	1	9
Massachusetts	19	3	15	2	13
Michigan	13	2	10	2	8
Minnesota	12	2	11	3	8
Mississippi	9	1	8	1	7
Missouri	13	1	12	3	9
Montana	12	2	10	1	9
Nebraska	—	—	—	—	—
Nevada	11	1	10	2	8
New Hampshire	20	2	18	5	13
New Jersey	16	2	14	1	13
New Mexico	13	3	10	3	7
New York	16	1	15	1	14
North Carolina	12	1	11	1	10
North Dakota	15	4	11	3	9
Ohio	15	2	12	1	11
Oklahoma	15	3	12	2	10
Oregon	13	2	11	5	7
Pennsylvania	17	2	16	2	14
Rhode Island	18	2	16	4	12
South Carolina	14	2	12	4	8
South Dakota	10	1	9	2	7
Tennessee	12	2	10	1	9
Texas	12	3	9	3	6
Utah	10	2	8	2	7
Vermont	—	—	—	—	—
Virginia	14	2	12	3	9
Washington	11	2	9	3	6
West Virginia	15	2	13	4	10
Wisconsin	14	2	12	2	10
Wyoming	14	1	12	3	10
Other jurisdictions
District of Columbia	—	—	—	—	—
DoDEA¹	8	1	8	1	6
— Not available. ¹ Department of Defense Education Activity (overseas and domestic schools). NOTE: SD includes those identified under section 504. The national results include both public and nonpublic school students. The national (public) and state/jurisdiction results include public school students only. Detail may not sum to totals because of rounding. SOURCE: U.S. Department of Education, Institute of Education Sciences, National Center for Education Statistics, National Assessment of Educational Progress (NAEP), 2009 Science Assessment.

	Percentage of all students
State/jurisdiction	Identified	Excluded	Assessed	Assessed without accommodations	Assessed with accommodations
Nation	11	2	10	2	8
Nation (public)	12	2	10	2	8
Alabama	10	1	9	6	3
Alaska	—	—	—	—	—
Arizona	11	2	9	2	7
Arkansas	11	1	10	2	9
California	9	1	7	2	5
Colorado	9	1	8	1	7
Connecticut	11	1	10	2	8
Delaware	13	1	12	1	12
Florida	12	1	11	1	10
Georgia	11	1	9	1	8
Hawaii	11	1	10	2	8
Idaho	8	1	7	2	5
Illinois	13	1	12	2	10
Indiana	14	2	12	1	10
Iowa	14	1	13	1	11
Kansas	—	—	—	—	—
Kentucky	11	2	9	1	8
Louisiana	12	1	11	2	9
Maine	15	2	14	2	12
Maryland	11	2	8	1	8
Massachusetts	17	3	14	2	12
Michigan	13	2	10	2	8
Minnesota	12	2	10	2	8
Mississippi	9	1	8	1	7
Missouri	13	1	11	2	9
Montana	12	2	10	1	9
Nebraska	—	—	—	—	—
Nevada	10	1	9	2	7
New Hampshire	16	2	14	2	12
New Jersey	14	2	13	1	12
New Mexico	13	3	10	3	7
New York	14	1	13	#	13
North Carolina	11	1	10	1	9
North Dakota	13	4	9	1	8
Ohio	14	2	12	1	11
Oklahoma	15	3	12	2	10
Oregon	13	2	11	4	6
Pennsylvania	17	1	15	2	14
Rhode Island	17	2	15	3	12
South Carolina	13	2	11	3	7
South Dakota	10	1	9	2	7
Tennessee	11	2	10	1	9
Texas	10	3	7	2	5
Utah	10	2	8	2	7
Vermont	—	—	—	—	—
Virginia	13	2	11	2	9
Washington	11	2	9	3	6
West Virginia	13	2	12	2	9
Wisconsin	14	2	12	2	10
Wyoming	13	1	11	2	9
Other jurisdictions
District of Columbia	—	—	—	—	—
DoDEA¹	8	1	7	1	6
— Not available. # Rounds to zero. ¹ Department of Defense Education Activity (overseas and domestic schools). NOTE: In NAEP, students who have an Individualized Education Program or a 504 plan are classified as students with disabilities. The national results include both public and nonpublic school students. The national (public) and state/jurisdiction results include public school students only. Detail may not sum to totals because of rounding. SOURCE: U.S. Department of Education, Institute of Education Sciences, National Center for Education Statistics, National Assessment of Educational Progress (NAEP), 2009 Science Assessment.

	Percentage of identified SD students
State/jurisdiction	Excluded	Assessed	Assessed without accommodations	Assessed with accommodations
Nation	13	87	17	70
Nation (public)	14	86	17	70
Alabama	12	88	59	29
Alaska	—	—	—	—
Arizona	16	84	20	65
Arkansas	9	91	16	74
California	16	84	30	54
Colorado	12	88	12	76
Connecticut	10	90	17	73
Delaware	8	92	8	84
Florida	9	91	8	83
Georgia	13	87	14	73
Hawaii	8	92	27	65
Idaho	13	87	28	59
Illinois	6	94	16	78
Indiana	14	86	11	75
Iowa	8	92	10	82
Kansas	—	—	—	—
Kentucky	19	81	13	68
Louisiana	10	90	13	78
Maine	9	91	16	75
Maryland	20	80	9	71
Massachusetts	17	83	13	70
Michigan	19	81	15	67
Minnesota	14	86	22	63
Mississippi	10	90	15	75
Missouri	8	92	20	72
Montana	16	84	12	73
Nebraska	—	—	—	—
Nevada	12	88	19	69
New Hampshire	10	90	23	67
New Jersey	11	89	8	81
New Mexico	23	77	21	57
New York	7	93	4	89
North Carolina	11	89	9	80
North Dakota	27	73	17	57
Ohio	14	86	7	78
Oklahoma	21	79	16	63
Oregon	13	87	36	52
Pennsylvania	9	91	11	80
Rhode Island	10	90	20	69
South Carolina	14	86	28	58
South Dakota	12	88	23	65
Tennessee	14	86	11	75
Texas	26	74	25	49
Utah	15	85	18	67
Vermont	—	—	—	—
Virginia	12	88	21	67
Washington	17	83	27	56
West Virginia	11	89	24	66
Wisconsin	13	87	14	73
Wyoming	11	89	20	70
Other jurisdictions
District of Columbia	—	—	—	—
DoDEA¹	9	91	14	76
— Not available. ¹ Department of Defense Education Activity (overseas and domestic schools). NOTE: SD includes those identified under section 504. In NAEP, students who have an IEP or a 504 plan are classified as students with disabilities. The national results include both public and nonpublic school students. The national (public) and state/jurisdiction results include public school students only. Detail may not sum to totals because of rounding. SOURCE: U.S. Department of Education, Institute of Education Sciences, National Center for Education Statistics, National Assessment of Educational Progress (NAEP), 2009 Science Assessment.

	Percentage of all students
Jurisdiction	Identified	Excluded	Assessed	Assessed without accommodations	Assessed with accommodations
Nation	13	3	11	4	7
NOTE: SD includes those identified under section 504. Detail may not sum to total because of rounding. SOURCE: U.S. Department of Education, Institute of Education Sciences, National Center for Education Statistics, National Assessment of Educational Progress (NAEP), 2009 Science Assessment.