In books about true subjects, there is usually a page at the end saying where the writer got his or her information. Sometimes you will see this on the Internet, too. You should include these sources in your school report. If there are lots of quotes or charts on a page and there is no information about where these came from, be careful in using them. Try to find out more about this information, or ask a librarian for advice.
Many people can put information on the Internet.
It doesn't cost much, and it isn't very hard to have your own home page that says anything you want it to say. Imagine you knew a kid in school whom you didn't like, and you decided to put insults and ugly pictures you drew of that kid on your home page. Just because it's on the Internet, on your home page, doesn't mean it's true. There are many things on the 'Net that are put there by one person or group that has a certain opinion. Sometimes this information is biased, which means it doesn't give you all the information and opinions you might like to know about.