If you really look at how schools piss money away on tech gadgets only to let them collect dust you will find incredible waste. For as long as I can remember, the AV equipment at the various schools I attended sat unused for 99.99% of the time. For an hour session there simply wasn't time to get the cart, set it up, show a video and break it down for the next class. Most schools don't have a dedicated AV department unless they specialize in AV production. So the teachers are left to retrieve and set up the systems and most of them can't even change a lightbulb.
In a high school shop class we has a pretty fancy and expensive AV cart with a pro level Sony Trinitron Monitor and VCR. It just sat in the tool cage year round collecting dust. One day another shop teacher wanted to use the cart to show a video to his class. Turns out some knucklehead destroyed the cart by cutting wires and jamming a metal rod into the VCR destroying the tape load mechanism. There was a huge shit storm and our class was blamed. And rightfully so because we had a surplus of knuckleheads. The quoted cost of that AV cart? $5000. And I believe it seeing how the equipment was top of the line Sony stuff. And this wasn't the only AV cart in the school, we had about a dozen of them. They did nothing year round until some teacher worked a video into a lesson. In fact the only time I ever watched a video in my four years of high school was in health class and English where we watched a film of The Tragedy of Macbeth.
And I not even going to get into the $250,000 robotics system that sat unused for years until my electrical installation shop teacher convinced the school to give us the system instead of the snobby ET department who didn't care if it was sold for scrap. I headed up that project and it was a wonderful experience working with that system.