Paragraphs.
I won't be surprised to see a ruggedized version issued to each school child beginning at kindergarten or first grade. They are a perfect substitute for the overly priced and often obsolete text books and they are a way for each teacher to ensure that notes are taken and/or made available, all homework and in class assignments are completed, and tests and quizzes are done such that minimal cheating is possible.
Sorry, teacher! I noticed that after I hit post, too bad FR doesn’t have an edit button for correcting already posted posts! ;-)
ipad users aren’t all that good with computers.