You might say that we actually have over 14,000 systems, which is the number of school districts in the country. (gse.harvard.edu)
Yes, a vast majority of school districts in the country are run by elected boards. (nytimes.com)
After teachers paid 3,000 house calls to improve relations with the parents of their students, all nine schools in the city's unified school district pilot program reported improvement in the classroom. (edition.cnn.com)