One of my favorite resources as a parent and teacher in this digital age is Common Sense Media. Common Sense Media has grown tremendously in the past few years, they are "dedicated to improving the lives of kids and families by providing trustworthy information, education, and independent voice they need to thrive in a world of media and technology."
Today, I am including their catchy Pause & Think Online Video.
(Classroom posters are available as well, here.)
The website is a wealth of information...definitely worth checking out...their blog "Making Sense" has some great posts focused on "parenting, media and everything in between."