Is it a GOOD site?

Imagine that your teacher gave you the assignment to research Year-Round School (some parts of the world--and even here in the U.S.--have school all year long with several shorter breaks instead of one BIG break for three months in the summer).

You decide to google the search phrase "year-round school" and you find these links:

The question is, are these "good" websites for your research project? How can you determine the quality of a website?
Try to think up at least three things that you would look for to tell if it's a "good" website.