Dividers among preschool, primary, secondary, and tertiary - probably these have been about the same, depending on where, but just my guessing. Preschool, anything at or "below" kindergarten. First Grade through sixth grade is primary school, starting about age 5 going through about age 11 or 12. Secondary school is high school, ages 13 through 18, about grades 9 to 12. Education after secondary, is tertiary school which would be any of vocational school or college or university.Readin', 'ritin', 'rithmetic. Would be a decent place to start.
What was academic life like, back-in-the-day3 ? What are the dividing factors between pre-school, primary, secondary and... tertiary ?
Given the ubiquity of camera-phones and xpads, homework could include a graded "cleaning one's room", "doing the dishes", "taking out the garbage", et cetera.