(adapted from NPR story on fact-checking; link below)

"Stopping the proliferation of fake news isn't just the responsibility of the platforms used to spread it. Those who consume news also need to find ways of determining if what they're reading is true. We offer several tips below. ..."

1. Pay attention to the domain and URL (is it .edu or .ru?)
2. Read the "About Us" section (are they a think tank? who funds them?)
3. Look at the quotes in a story (are they filled with extreme words like always/sometimes/never?)
4. Look at who said them (are the speakers trustworthy?)
5. Check the comments (who is the intended audience of this page?)
6. Reverse image search (is this a Photoshop job?)
7. Check all other primary sources, like government documents (are they real? are they being quoted accurately?)

These aren't the only place to look, since checking facts involves your own critical thinking to determine what is relevant and authoritative. But these can provide a good place to start and some ideas for sources.