Sitting in a classroom-style lecture is painful for most people most of the time. We all know this, yet so many deny it or view it as a personal failing.
When sitting and listening, we squirm. We watch the clock tick slowly. Minutes can seem like hours.
We escape into our own head. We invent activities to either occupy or numb ourselves. The most talented classroom sitters create micro-tasks to busy their hands and the other 80% of their minds.
And it is cumulative. The first hour of lecture is bearable in a day. The second is hard. The third is white-hot excruciating. The periodic highly engaging presenter does little to soften the physiological impact of the subsequent dull one.
This goes beyond a power thing, or even an interest thing, or quality of the teachers thing. Corporate leaders, even Presidents of countries, attending highly relevant daylong events with the highest tier speakers, are suppressing their own body ticks 90 minutes in. The lunch break becomes an oasis.
Students are psychologically ravished daily by this onslaught. And it is costly on all involved.
While it subverts most industrial business and logistics models, two non-adjacent hours of lecture a day should be the highest amount for any institution or program. And the most successful will have even less than that.