Chromecast!

Chromecast devices are low cost, small, yet powerful.

We have purchased a handful of Chromecast devices to explore their use within IT and the schools. I know some of the schools are already using the devices to varying degrees. This product is another example of a seamless implementation by Google. The dongle (it's the picture on the box) plugs into the HDMI port on a TV or projector and can be powered by either USB on the TV/projector or through a wall plug. It allows the user to easily share their Chrome web browser tab on the screen. This enables you to share content with your students by simply clicking a button in your Chrome web browser! Google has more information here.