If the author of a site includes a source bibliography, you or the learners can consult these sources to find additional information about the topic and compare the author's content with other works. Other questions that you can ask yourself are:

• Are the references clear enough to follow up?
• Are the sources used of good standing?
• Are the links contained in the web site connected to well respected/valid resources?
• Is the information correct? Can the information be checked?

Look at site on dolphins (online), and you will see that the information can be considered accurate. Pay special attention to the referencing of sources.