"Ok, this is a good one. My school is already setup with a printer in every classroom. They are not AirPrint ready but they are networked or connected to a computer on the network.
Here I'll show you how I have all my network printers setup so I can use AirPrint to be able to print from an ipad to them using one copy of FingerPrint. I think it was $25. There's a free trial that just puts a watermark on your print so you can really fully try it before you buy."
Via John Evans