In Singapore, the duration of school days can vary depending on the level of education. Here is a general overview of the typical school hours for different levels:

1. Primary School: On average, primary school students have school from around 7:30 AM to 1:30 PM. Some schools may have slightly different timings, but the duration is generally around 6 hours.
2. Secondary School: Secondary school students usually have longer school days than primary school students. They typically start around 7:30 AM and finish between 1:30 PM and 4:30 PM, depending on the school and the student’s grade level. The school day can last between 6 to 9 hours.
3. Junior College/Pre-University: Junior college students, who are in the last two years of their pre-university education, generally have longer school days compared to secondary school students. The school day typically starts around 7:30 AM and ends between 2:30 PM and 6:00 PM. The duration can vary depending on the student’s course schedule and extracurricular activities.