Hard task to validate a website taking into account the 5 principles! Still, we , as teachers to be, have to bare in mind what t sites to advise to our students. It's a great responsibility! This is why I am an obstinate fan of books!
Me too Fabi, but students don't like much reading books. They are fascinated with the computer, you know. However, we have a similar task with books, that is, we should read them before recommending students, because not all of them are reliable.Kisses.