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"With Air Display, you can use your iPad, iPhone, or iPod touch as a wireless display, to extend your computer desktop. Setting up the app is as simple as downloading a client and selecting your iPad (running Air Display) from a pull-down menu in the Menu Bar."

This is a very easy and slick app to set up on your Mac, especially when you can drag your toolbars and panels onto the iPad or even your iPhone.

"A feature that has long been request by educators has finally arrived in iPad 2: video mirroring. Video mirroring shows exactly what's on your device's screen on a second display, like a projector, television, or monitor. We're used to video mirroring with laptops--many teachers do this everyday. iPad 2 requires either the Apple VGA Adapter or Apple Digital AV Adapter. The VGA adapter connects to most projectors while the digital adapter connects to HDMI, which is common on newer televisions. Apple Digital AV Adapter also outputs sound while the VGA adapter outputs only video to the display."

"Kitted out with a miniature Raspberry Pi computer for a heads-up display (HUD) integrated in an external helmet, two Mikrotik routers, wireless sniffing and attack tools, GPS and a netbook, the motorcycle is able to detect wireless access points and plot them on Google Maps."

"You've probably seen them in newspapers, magazines or other paper-based publications: two-dimensional bar codes, called quick response codes (QR codes). What are they? They have been described as paper-based hyperlinks, and this is a good description. You simply take a picture of a QR code with your smart phone, and you get redirected to a website using your cell phone's browser. They can also be used digitally-you can append a QR code to a Tweet, or they can be displayed on a web page to transfer contact information directly to a cell phone, for example. This technology is blurring the distinction between smart phones, digital destination and content, and paper-based communication mediums."

This is a fabulous introduction to using Diigo in schools. "Welcome to Student Learning with Diigo. This site was completed in partial fulfillment of the requirements of of ISLT 9440, Learning with the Internet, a graduate class, during the Fall 2010 from the University of Missouri. Educators, worldwide, have enjoyed the use of this social bookmarking site. Diigo is a great web-based tool for teachers to utilize, to motivate, and to engage students of all ages in the learning process. We invite you to explore the various features of Diigo. Become educated and informed on the powerful use of Diigo for student learning. Learn how this research tool can enhance classroom instruction and promote higher levels of student collaboration. As you navigate through our site you will see examples of valuable lessons and resources, all displayed for your use. Set up your account now. This research tool is every educator's dream."

A neat infographic that shows the use by US schools of social networking tools