There is a lot of great information available online, but it is often mixed in with the not as credible information. When looking for information for an assignment, remember to think about the 5 w's:
Who- Who created that information? What do we know about them and why do we trust them?
What- What does the information tell you about your topic? Does it answer your research question?
Where- Where did the information come from? Does the author give their sources?
When- When was the information created? When was it last updated?
Why- Why was the information created? To inform and educate? To sell? To persuade you to think a certain way?