Being a responsible user of online content includes evaluating websites for appropriate use in the classroom. This includes many different factors, such as readability level, bias, purpose, and the author's credentials. Too many times students, and adults alike, lose valuable time online with resources that do not need the need of their task at hand. Don't be one of these frustrated users-know what you're looking for and what you're looking at.
Teaching Zack to Think
Evaluating Websites: Techniques to Apply and Questions to Ask
The Good, the Bad and the Ugly
The Quality Information Checklist