Use of laptops and similar devices is not permitted in my classes.
Here are some links providing evidence that we learn better if we take notes by hand, rather than on our laptops.

From the journal, Psychological Science, an article by Pam Mueller and David Oppenheimer reporting their original research

The next three articles report the on the Mueller/Oppenheimer study

The New Yorker

Psychology Today

A related point: There is reason to think we absorb less when reading a Kindle rather than paper,
from The Guardian

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