I received a review unit of the Prijector, a neat little device that allows you to wirelessly mirror Windows, Mac, OS X, Linux Android, and iOS devices to an HDMI-equipped LCD projector or monitor/TV. (Chrome mirroring is coming soon.)
It has two modes-- a guest mode that gives others access to the Internet and to mirroring and an intranet mode which allows devices on the same intranet sub-net to use a sharing code for mirroring., (https://prijector.com/support/faq-12.html
It is necessary to download an app for mirroring for all devices but iOS. (iOS devices mirror through AirPlay.) It is easy to move the sound over to the projector/monitor, too. (If your projector.monitor does not have HDMI, you can use one of the Kanex HDMI-VGA converters, although you will have to run a cable to for the sound to be mirrored.)
It took me a little bit of time to figure out how to make it work. Prijector's real-time chat support was very good and helped me out. Once the Prijector was set up, it was easy to mirror all of my different devices without any further configuration.
The Prijector also includes built-in connections to Skype, Google+ Hangouts, and Lync to give access to easy videoconferencing.
This would be a useful device for schools with a BYOD initiative, since, with Chrome support coming soon, all operating systems of the devices students would be using could be wirelessly mirrored to the large screen. It would also be handy when PD consultants come to your district to train, since they can easily mirror their laptops or tablets while working with teachers. And, of course, if you are using any device to teach with, the Prijector allows you to easily mirror your screen wirelessly!