A PLN is a vital part of every educators career. Whether it is their fellow teachers in their building, or educators around the world, a PLN supports, shares, and educates each other. This a great poster that explains how to use Twitter to create a PLN.
"Enter a URL above and hit “go” to shorten your link and create a QRCode that withFREEregistration comes complete with QR Code Tracking and Activity Maps. Alternatively, select a service to create mobile-friendly pages that can includevideo, images, and call-to-action links for your QRCode campaigns."