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Number of public schools and average and median number of days in the school year reported by public schools, by National School Lunch Program participation: School year 2007–08

National School Lunch Program Number of schools   Average number of days   Median number of days  
All public schools  90,800   179.6   179.4  
Percent of K-12 students who were approved
  for free or reduced-price lunches
Less than 50  48,600   179.2   179.4  
50 or more  37,800   179.6   179.4  
School did not participate in free or
  reduced-price lunch program
4,300   183.9   179.5  
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 File," 2007–08.