Valid or Not?

Well, when I read this homework post by Mrs. V, I thought to myself that I really didn't know how to check to see if a site was valid. I really have a lack of knowledge for this topic. I do however know that the majority of students choose sites because they are easy to read and short. We never check to see where the information is from; when we find information that we are looking for we tend to just believe it. I know that sites tend to be more valid if they have a .gov or .edu. There are some "phony" .gov or .edu sites, so remember that these kind of sites are not always valid. I remember something from back in the day too. I don't know if this is true, but I remember hearing that you never want a web address that is very long. The shorter the web address is, the better. I also know that you should look and see the qualifications, job, and degrees earned of the person who wrote posted information. So really you don't want a middle school student's work, but rather a college professor's. This is all I know, and I don't even know if it is all true. Let me know what you all think!