But if I just want a cup, the (removable) ~16oz filter basket allows me to add a filter, rinse it in the basket, add the coffee, shut the manual valve to stop, turn on the machine to add just-boiling water, let rest for however I long I want, then open the basket valve to run filtered coffee into my cup. Voila! As good as french press, as easy to clean as a Hario.
Actually, you forgot to amortize the cost of the textbook according to its reuse from year to year. If we assume the textbook has a life-span of only four years (an extreme lower bound), then you find that you spend $800 in the first year per student, $800 in the next year, per student, again in the third, and the fourth, for $3200 to graduate your first senior class from high school. But every class after them graduates for free (assuming no lost books) until it's time to buy books again. Just assuming four years for the life span of a book, the cost per student drop down to $800 dollars, which is 81% of the cost of the iPad approach.
Replacement of hardware, bulk purchasing, book lifespan, etc. all change the numbers, of course. But $3200 to $980 is incorrect.