Humanities Indicators
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I-13c: Percentage of Public Middle School Students in Classes Taught by a Departmentalized Instructor* with a Degree in That Subject, for Selected Subjects, 1988–2012

* Middle school teachers are those who taught students in grades 5–9 and did not teach any students in grades 10–12. Teachers who identified themselves as elementary or special education teachers were excluded.
** Data not collected for this subject in 1988.
*** The Natural Science category aggregates teachers of general science and specific science disciplines (e.g., chemistry). Such teachers are considered to hold a credential in the subject they teach if the degree or certification is in general science or a specific science discipline.
! Interpret data with caution. The standard error for this estimate is between 30% and 50% of the estimated value.

Source: For years 1988–2000: Marilyn M. Seastrom et al., Qualifications of the Public School Teacher Workforce: Prevalence of Out-of-Field Teaching 1987–88 to 1999–2000, Statistical Analysis Report NCES 2002-603 Revised (Washington, DC: National Center for Education Statistics, 2002), 61 table B-8. For 2012: Stéphane Baldi, Catharine Warner-Griffin, and Chrystine Tadler, Education and Certification Qualifications of Public Middle Grades Teachers of Selected Subjects: Evidence from the 2011–12 Schools and Staffing Survey (Washington, DC: U.S. Government Printing Office, 2015), 29 table 25.

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