Introductory Physics Learning Sources. Reliable?

[AznBoi]

I'm currently a Physics B student and I was wondering how you determine whether an online "Physics Tutorial/classroom" source is reliable and trustable based on the information it provides. For example the Physics Classroom. So far it has worked to my advantage but I'm not totally sure whether to rely on every piece of information. How can you be sure?

Btw, please help me check the source I'm using:
http://www.glenbrook.k12.il.us/gbssci/phys/Class/estatics/u8l1c.html [Broken]

Thanks!

 

[andrevdh]

According to the credentials of the author http://www.glenbrook.k12.il.us/gbssci/phys/Class/info.html" [Broken]
and since he put such a tremendous amount of effort into produce such a well designed site I would definitely recommend it. One always find that a small percentage of information is incorrect in most sources. But it is usually outweighted by the other that is correct.