Good site for teaching internet safety for middle elementary grades. Engaging, interactive set of videos.
Have you seen the discussion in the Texas Thinkfinity group that addresses Internet Safety which developed from the site you mentioned in your discussion starter? There is also a discussion in the Community Hub on Internet Safety - What are some good Thinkfinity lessons that teach about Internet safety (for example: cyberbullying)?
This is a very important topic to teach elementary and middle school students. I'm glad you found the Professor Garfield website dealing with Internet Safety. There are many other subjects covered at the homepage of Professor Garfield - http://www.professorgarfield.org/pgf_home.html. It's worth a look when you have time!
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With the age of cyber savvy kids on the rise, keeping children safe online is an important part of education, and parents can play a primary role in teaching their children Internet safety. Digital education is not only about learning how to program or use software but also about knowing who the villains can be. Here are links to 6 Internet Safety Games To Help Kids Become Cyber Smart. The games are fun to play and provide excellent educational information.