Number of public schools and average and median number of hours in the school day reported by public schools, by National School Lunch Program participation: School years 2003–04 and 2007–08

2003–04 2007–08
National School Lunch Program Number of schools   Average number of hours   Median number of hours   Number of schools   Average number of hours   Median number of hours  
All public schools  88,100   6.6   6.6   90,800   6.6   6.7  
Percent of K-12 students who were approved
  for free or reduced-price lunches 
                       
Less than 50  50,000   6.6   6.7   48,600   6.7   6.7  
50 or more  34,300   6.6   6.6   37,800   6.7   6.7  
School did not participate in free or
  reduced-price lunch program
3,800   5.8   6.2   4,300   5.8   6.3  
NOTE: These estimates include traditional public schools and public charter schools. 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), "Public School Data Files," 2003–04 and 2007–08.