Our school bought a for every student in two classes as a .
The first month was noisy and produced almost no learning.
Students opened other , and teachers spent the lesson walking behind them.
The school then changed one rule: s stay face down until a teacher asks for them.
A is now used for perhaps fifteen minutes in a forty-five-minute lesson.
Those minutes are for things paper cannot do: a map that moves, a experiment that repeats, a quick class .
Written work is still done on paper, because is slower for most of the class.
The also found a cost that nobody had listed: charging.
Thirty devices need somewhere to charge overnight, and the school had four in that room.
A good tool used for a quarter of the lesson beat a good tool used for all of it.