Hve you tried informing them that there is a statistic that can't be ingnored? Computer uses in schools has risen steadily over the last 20 years. Overall grades and graduation rates for most districts has fallen in the same time frame.
Stop wasting money on toys. I'm all for gadgets and gizmos, but using iPads for school? That's a joke.
The education system in the US is a complicated one, you can't say that declining grades are the direct result of increased computer uses. The declining of grades could be from other causes.