Ask, with no name attached
Type the thing you did not get. Nothing about you is stored, not even a nickname.
Nobody asks it.
Every subject gets its own board. dout lets you ask your professor anonymously, and lets everyone else say ME TOO with one tap. The professor sees what the lecture actually lost, not just who was brave enough to raise a hand.
Live from the feed. Stronger colour = more people lost.
Type the thing you did not get. Nothing about you is stored, not even a nickname.
If they were stuck at the same spot, one tap says so. The tile gets darker. The count is the proof you were never alone.
Their dashboard ranks doubts by count, so the next lecture starts where this one lost people.
Psychologists call it pluralistic ignorance: each student privately assumes everyone else understood, so the question stays unasked. Anonymity removes the cost of asking. The Me too count removes the illusion that you were the only one.
Miller & McFarland (1987), Journal of Personality and Social Psychology · Stowell, Oldham & Bennett (2010), Teaching of Psychology · Read the full problem and research