Final answer:
The average start and finish times of a school day can vary depending on the school and grade level.
Step-by-step explanation:
The average start and finish times of a school day can vary depending on the school and grade level. In the United States, the Department of Education's National Center for Education Statistics conducted a survey in 2003-04 that found the average length of a school day to be 6.64 hours for public schools and 6.45 hours for private schools. However, it's important to note that these are averages and individual schools may have different start and finish times.
For example, some elementary schools may start as early as 7:30 a.m. and finish around 2:30 p.m., while high schools may start later, around 8:00 a.m., and finish around 3:30 p.m. It's best to check with your specific school or district to get the exact start and finish times for your school.