* Grade Level: Elementary school students generally have shorter school days than high school students.
* School District: Different school districts have different schedules and lengths of school years. Some districts might have longer school days or years than others.
* State: State regulations can influence the minimum number of school days required.
* School Type: Public, private, and charter schools may have varying schedules.
While a typical school year might be around 180 days, the number of *hours* per day and the total *hours* per year varies considerably. A rough estimate for a K-12 average might be between 900 and 1100 hours per year, but this is just a broad generalization and shouldn't be taken as precise. To get a more accurate figure, you'd need to specify the grade level, state, and type of school.