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Percentage of students in primary, middle grade, and high school private school classes, by teacher certification for that grade range: 2011–12

Characteristic Taught by teachers with full state certification Taught by teachers without full state certification  
Certified in grade
range
  Not certified in grade range  
All private school students 51.4   3.2   45.4  
             
Teaching grade range            
Primary (grades K–5) 50.8   3.9   45.2  
Middle (grades 6–8) 56.4   3.7 ! 39.9  
High (grades 9–12) 47.4   1.9 ! 50.7  
! 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).
NOTE: Teachers are counted as having full state certification if they reported having a "regular or standard state certificate or advanced professional certificate" or "certificate issued after satisfying all requirements except the completion of a probationary period." Teachers are counted as having certification in grade range if they were certified in "early childhood, preschool, or at least one of grades K–5" for primary students, were certified in "at least one of grades 6–8" for middle students, or were certified in "at least one of grades 9–12" for high students. Detail may not sum to totals because of rounding.
SOURCE: U.S. Department of Education, National Center for Education Statistics, Schools and Staffing Survey (SASS), "Private School Teacher Data File," 2011–12.