The headline is easy: roughly five and a half hours of sleep on a normal school night. That number gets attention, but it isn't the most useful thing in the data.
The more useful pattern is timing. Reported stress didn't peak during class. It peaked in the gap between finishing activities and starting homework — the moment when the size of the evening becomes visible all at once.
That matters because it tells you where an intervention belongs. A breathing exercise at 1am is damage control. A two-minute reset at 6pm, before the pile is even opened, is prevention.
It also shaped the Stress Check on this site. The questions are about what's happening right now, not about how your month has been, because a recommendation you can act on in the next 120 seconds is worth more than an accurate score.