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Average start time for California public high schools and percentage distribution of start times in public high schools, by selected school characteristics: 2011–12

          Percentage distribution of public high school start times
Selected school characteristic   Total number of public high schools   Average start time for public high schools (AM)1   Before 8:30 AM   8:30 AM or later
All public schools   2,040   8:04   84.1   15.9  
School classification                  
Traditional public   1,850   8:03   85.7   14.3  
Charter school     8:10   68.0   32.0  
                   
Community type                  
City   700   8:03   82.9   17.1 !
Suburban   650   8:02   81.8   18.2 !
Town   280   8:04   96.5    
Rural   420   8:06   81.7   18.3 !
                   
Student enrollment                  
Less than 100   490   8:16   72.4   27.6 !
100–199   230   8:06   83.5    
200–499   290   8:12   69.3   30.7 !
500–749   140   8:09   72.5    
750–999   80 ! 7:56   100.0   #  
1,000 or more   800   7:52   97.6   2.4 !
Percent of K–12 students who were approved for free or reduced–price lunches                  
0–34   620   8:01   84.2   15.8 !
35–49   230   8:02   88.6    
50–74   430   7:57   91.2    
75 or more   630   8:10   78.2   21.8 !
School did not participate in free or reduced-price lunch program   140 ! 8:10   81.6    
# 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) or the response rate is below 50 percent.
1In 2011–12, all California public high schools reported AM start times.
NOTE: High schools include any schools where the lowest grade is any of grades 7–12 and the highest grade is any of grades 9–12. 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, Schools and Staffing Survey (SASS), "Public School Teacher Data File," 2011–12.