I recently meet someone attended a US school still using the quarter system.
I've heard several theories, the most popular being that the semester system is easier for university to administrate. I've also heard it is so the university breaks will line up better with K-12 school break schedule.
No one has ever explained to me why semesters or more efficient, or more family friendly. I only know 1 person educated with the quarter system in the last 10 years. Is there a reason most US universities adopted semesters?
I'll let someone else address why schools ended up on semesters rather than quarters, but I'd note that there are some benefits to being on the "standard" academic calendar, whichever it happens to be:
- Many internship programs are built around the standard academic calendar.
- This is particularly extreme for law schools, where the internship experience is both very important and very structured. Even schools on the quarter system run their law schools on the semester system.
- Similarly, there are many one semester thematic programs that faculty might want to attend. Spring semester programs typically overlap two quarters, meaning participants from quarter system schools have to either cut their participation short or arrange to be away from teaching for two thirds of the year instead of half.
So once it was clear that the semester system was predominating, other schools had incentives to hop on board even if the mildly preferred quarters on their own merits.