Processing Assessment Materials → Processing Schedules and Overall Counts for the 2012 Assessment → Number of Students Withdrawn/ineligible, Excluded, Assessed, and Absent, by Session Type and Grade/Age: 2012

NAEP Technical DocumentationNumber of students withdrawn/ineligible, excluded, assessed, and absent, by session type and grade/age: 2012

Grade/age	Session type	Number of sessions	Number of withdrawn/ineligible students	Number of students excluded from the assessment	Number of students to be assessed	Number of students absent the day of testing	Number of students assessed
§ Less than 100 students. NOTE: LTT = Long-term trend. Sessions and student counts are rounded to nearest hundred. 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), 2012 Assessment.
Grade 4	Total	600	600	300	13,600	600	13,000
	Computer-based writing	600	600	300	13,600	600	13,000
Grade 12	Total	900	1,800	400	17,800	2,600	15,200
	Economics	900	1,800	400	17,800	2,600	15,200
Age 9	Total	700	900	300	18,500	1,000	17,500
	Reading and mathematics - LTT pilot	100	100	§	2,600	100	2,300
	Reading and mathematics - LTT operational and pilot	500	600	200	14,200	800	13,500
	Reading and mathematics - LTT operational only	§	100	§	1,800	§	1,700
Age 13	Total	800	600	300	19,000	1,300	17,700
	Reading and mathematics - LTT pilot	100	100	§	2,600	200	2,400
	Reading and mathematics - LTT operational and pilot	600	400	200	14,500	900	13,500
	Reading and mathematics - LTT operational only	§	§	§	1,800	100	1,700
Age 17	Total	700	2,200	500	19,600	2,300	17,300
	Reading and mathematics - LTT operational and pilot	645	1,900	400	17,700	2,100	15,600
	Reading and mathematics - LTT operational only	§	200	§	1,900	100	1,700

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