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Percentage distribution of teachers in public middle and high schools, by type of teaching certification, teacher main assignment, and selected school characteristics: 2017–18

                     
Main teaching assignment and selected school characteristic Regular/ advanced   Probationary   Temporary   Emergency   None  
  All public school teachers 90.6   3.0   3.8   1.1   1.5  
                     
Teaching field and school characteristic                    
                     
  Mathematics 91.5   2.8   3.4   1.2   1.1  
Percent of students who were non-White                    
  0–24 94.2   2.0   3.2   ‡   0.5  !
  25–49 93.6   3.0   1.8   1.0  ! 0.7  !
  50–74 89.1   3.2   5.3   ‡   ‡  
  75 or more 87.5   3.4   3.9   2.8   2.4  
  Data not available 98.9   #   ‡   #   ‡  
                     
Percent of K–12 students who were approved
  for free or reduced‑price lunches		                    
  0–34 95.6   1.6   1.7   ‡   0.7  
  35–49 92.3   2.3  ! 3.7   ‡   0.7  !
  50–74 90.1   3.4   3.4   1.8  ! 1.2  !
  75 or more 86.9   4.0   5.3   1.9  ! 2.0  !
                     
Community type                    
  City 89.7   2.5   3.9   2.2   1.6  
  Suburban 91.9   2.4   3.6   1.1  ! 1.1  !
  Town 93.5   2.9   2.7  ! ‡   0.7  !
  Rural 92.2   4.2   2.3   ‡   ‡  
                     
Region                    
  Northeast 91.7   2.8  ! 3.5   1.1  ! 0.9  !
  Midwest 94.2   2.4   3.2  ! ‡   ‡  
  South 91.9   2.4   3.2   1.4   1.1  
  West 88.1   3.8   3.6   2.0  ! 2.5  !
                     
  Natural sciences 90.4   2.8   4.6   1.1   1.2  
Percent of students who were non-White                    
  0–24 92.6   1.4   4.2   ‡   ‡  
  25–49 91.7   2.8   3.0   1.3  ! 1.2  !
  50–74 91.2   3.5   4.2   ‡   ‡  
  75 or more 85.2   4.0   7.4   2.0  ! 1.4  
  Data not available 90.0   ‡   ‡   ‡   ‡  
                     
Percent of K–12 students who were approved
  for free or reduced‑price lunches		                    
  0–34 91.1   2.8   3.9   ‡   2.0  !
  35–49 94.8   ‡   3.4  ! ‡   ‡  
  50–74 89.4   4.8   3.9   1.7  ! ‡  
  75 or more 86.0   2.9  ! 7.4   1.8  ! 1.8  
                     
Community type                    
  City 85.8   5.2   5.6   1.5  ! 1.9  
  Suburban 92.1   1.9   4.3   ‡   1.4  !
  Town 88.0   2.9   4.7   4.0  ! ‡  
  Rural 94.5   1.3  ! 3.3   ‡   ‡  
                     
Region                    
  Northeast 90.3   ‡   6.5   ‡   0.7  !
  Midwest 94.7   1.9  ! 2.1   ‡   ‡  
  South 90.1   2.7   4.9   1.4  ! 0.9  !
  West 86.1   5.2   4.6   1.5  ! ‡  
                     
  Other1 90.4   3.1   3.7   1.1   1.6  
Percent of students who were non-White                    
  0–24 92.6   2.5   2.9   0.9   1.2  
  25–49 91.5   2.9   3.1   0.8   1.7  
  50–74 91.0   2.7   3.6   1.2   1.4  
  75 or more 87.5   4.4   4.6   1.4   2.0  
  Data not available 78.8   3.5  ! 10.9   3.0  ! 3.8  
                     
Percent of K–12 students who were approved
  for free or reduced‑price lunches		                    
  0–34 91.8   2.4   3.6   0.8   1.5  
  35–49 92.4   2.4   3.1   1.2   1.0  
  50–74 90.3   3.7   3.4   1.0   1.7  
  75 or more 86.8   4.2   5.0   1.7   2.3  
                     
Community type                    
  City 88.9   3.5   4.3   1.1   2.2  
  Suburban 91.8   2.6   3.5   0.9   1.2  
  Town 89.3   3.4   3.5   1.7   2.1  
  Rural 90.2   3.4   3.5   1.2   1.6  
                     
Region                    
  Northeast 92.5   2.5   3.3   0.8   0.8  
  Midwest 91.9   3.0   3.1   0.7   1.3  
  South 89.3   3.1   4.4   1.2   2.0  
  West 88.7   3.9   3.6   1.6   2.2  
# Rounds to zero.
! Interpret data with caution. The coefficient of variation (CV) for this estimate is between 30 percent and 50 percent (i.e., the standard error is at least 30 percent and less than 50 percent of the estimate).
‡ Reporting standards not met. The coefficient of variation (CV) for this estimate is 50 percent or greater (i.e., the standard error is 50 percent or more of the estimate).
1 Other teachers include those who teach any subject other than mathematics or natural sciences.
NOTE: Detail may not sum to totals because of rounding and because some data are not shown.
SOURCE: U.S. Department of Education, National Center for Education Statistics, National Teacher and Principal Survey (NTPS), "Public School Teacher Data File," 2017–18.

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