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Type of Difference
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ACS Estimate
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State-Provided Count
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Age Range
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5-21 years of age
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Not specified (elementary and secondary school-aged population is usually defined as 5-18 years of age)
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School Enrollment
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Enrollment status not specified (i.e., includes public and private schools)
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Newly and continually enrolled in elementary and secondary schools for which Consolidated State
Performance Reports are submitted by state education agencies (i.e., public schools including charter schools)
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Assessment Method
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Single question regarding spoken English ability
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Comprehensive assessment that incorporates information from multiple sources
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Mode of Response
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Indirect and subjective measure, based on the response of a parent (or other adult in the household) to a single question
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Direct evaluation based on a student’s performance in acquiring English proficiency
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Modality(ies) Assessed
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Speaking
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Speaking, listening, reading, and writing
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Context Assessed
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Not specified: likely to be community and family setting
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Classroom setting
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Basis for Distinguishing Proficient from Not Proficient
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Single national cut score
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State- or local-determined criteria
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Comparability Across States
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Item is identically presented across the nation; estimates based on a uniform methodology across the states
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States use different assessments, procedures, cut scores, and criteria; estimates based on different methodologies
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