<p>It’s worth noting that in upper level classes, 3-5 hours may be nowhere near sufficient to work, and it’s often sleep that goes, not EC activities. I took one course where the teacher legitimately expected 6 hours of work a night (in this case, my other courses lost time, rather than sleep). That’s been my experience at Andover, at least, and I’d be unsurprised if upper level courses at the other top schools require lots (although hopefully not as much work as that course I took) more work than 3-5 hours a day for all your classes.</p>