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Total number of middle, high, and combined schools and students and, among middle, high, and combined schools, average start time and percentage distribution of schools, by start time and selected school characteristics: 2015–16

    Number of middle, high and combined     Percentage distribution of start times  
Selected school characteristic   Schools   Students   Average start time   Before 7:30 a.m.   7:30 a.m. to 7:59 a.m.   8:00 a.m. to 8:29 a.m.   8:30 a.m. to 8:59 a.m.   9:00 a.m. or later  
All public schools   40,000   25,818,700   8:02   7.8   32.9   42.4   11.6   5.3  
                                   
School classification                                  
Traditional public   36,400   24,105,900   8:02   8.0   33.2   42.0   11.6   5.1  
Charter school   3,600   1,712,800   8:05   5.7   29.6   45.9   10.9   7.9  
                                 
Community type                                  
City   10,000   7,470,900   8:08   7.8   28.4   36.8   16.6   10.4  
Suburban   11,500   10,063,800   8:00   12.0   38.1   31.8   11.3   6.9  
Town   6,200   3,132,500   8:00   4.2   32.6   52.8   8.7    
Rural   12,300   5,151,500   8:01   5.7   31.8   51.6   9.2   1.7  
                                   
School level                                  
Middle   13,900   8,554,500   8:04   6.7   35.4   39.2   12.2   6.3  
High   17,900   14,345,400   7:59   10.4   35.8   40.4   9.6   3.8  
Combined   8,200   2,918,800   8:07   4.0   22.4   511.9   14.6   7.1  
                                   
Student enrollment                                  
Less than 100   4,600   199,800   8:09   3.7 ! 23.9   45.3   19.1   8.0 !
100-199   4,000   574,700   8:10   6.6   23.3   43.7   16.7   9.7  
200-499   11,300   3,867,800   8:02   4.6   34.0   50.2   7.7   3.5  
500-749   7,400   4,550,300   8:00   8.2   38.1   40.0   9.8   3.9  
750-999   4,900   4,229,700   8:02   7.9   35.0   40.6   11.1   5.4  
1,000 or more   7,700   12,396,300   7:58   15.2   35.3   31.8   12.2   5.6  
                                   
Percent of K-12 students who were approved for free or reduced-price lunches                                  
0-34   10,800   9,499,900   7:59   10.8   35.1   39.8   11.0   3.3  
35-49   5,800   3,956,600   8:01   5.4   36.6   44.1   9.3   4.6  
50-74   8,000   5,400,000   8:02   7.3   33.5   42.1   12.7   4.4  
75 or more   11,800   5,232,600   8:05   7.7   29.5   42.6   13.0   7.2  
School did not participate in free or reduced-price lunch program   3,500   1,729,700   8:07   4.3   29.9   47.1   9.5   9.1  
! 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).
NOTE: Detail may not sum to totals because of rounding.
SOURCE: U.S. Department of Education, National Center for Education Statistics, National Teacher and Principal Survey (NTPS), "Public School Teacher Data File," 2015–16.