This resource can be used to explain how false information can spread quickly online (especially when combined with the TED video on this page).
This game can be a great way to introduce the topic, assess what they've learned at the end of a class, or just have as practice!
This video from TED gives a quick and engaging overview of how false information can spread so quickly.
There are many fact-checking resources out there that can help students verify claims. Here are some that you can share with your students.