Digital citizenship includes being able to discern truth from falsehood.
Find the source
If something is posted on social media, click through to the original post. Is it a reliable source?
Verify the source
Search the source on Google, Bing, or Wikipedia to see if it's real.
Check elsewhere
Search the post's claims. Do known information sources have the same information?
Use a fact-checker
Sites like snopes.com fact-check widespread claims, myths, and urban legends.