Length of school day

https://nces.ed.gov/surveys/pss/tables/table_2004_06.asp

Average length of school year and average length of school day, by selected characteristics: United States, 2003–04
Selected characteristic	Average length of school year in days	Average length of school day in hours
Total	180.4	6.7
NCES typology
Catholic	179.0	6.7
Parochial	178.9	6.6
Diocesan	179.4	6.7
Private	178.4	6.8
Other religious	178.5	6.8
Conservative Christian	178.2	6.7
Affiliated	178.4	7.0
Unaffiliated	178.9	6.8
Nonsectarian	185.7	6.5
Regular	182.2	6.8
Special emphasis	184.1	6.5
Special education	195.6	6.1
School level
Elementary	179.6	6.7
Secondary	183.3	6.8
Combined	181.2	6.7
Program emphasis
Regular elementary/secondary
	178.9	6.8
Montessori	183.2	6.6
Special program emphasis	179.1	6.8
Special education	194.4	6.1
Vocational/technical	‡	‡
Alternative	184.0	6.4
Early childhood	203.6	6.2
Size (number of students)
Less than 50	181.9	6.6
50–149	180.7	6.7
150–299	179.3	6.7
300–499	178.9	6.8
500–749	178.4	6.9
750 or more	178.8	7.0
Region
Northeast	181.3	6.6
Midwest	178.5	6.7
South	180.2	6.8
West	182.2	6.7
Community type
Central city	181.6	6.8
Urban fringe/large town	180.6	6.7
Rural/small town	178.4	6.7
‡ Reporting standards not met.
SOURCE: U.S. Department of Education, National Center for Education Statistics, Private School Universe Survey (PSS), 2003–2004.