This really brings up a question that has been bugging me for years. Why must aren't HS (and below, really) schedules more college-like? Instead of 1hr of a s

This really brings up a question that has been bugging me for years. Why must aren't HS (and below, really) schedules more college-like? Instead of 1hr of a subject every day for 5 days, couldn't they do 2.5hrs of a subject twice a week? This would allow teachers to teach their preferred subject in multiple schools within the district. The current schedule just strikes me as inefficient; it forces teachers into picking up subjects they are not specialized in.