You can use Keynote on your Mac to create digital flash cards to study or quiz others. Each slide can contain the question and answer, but you can use builds to have only the question shown at first. You can shuffle these cards manually and also print them.
Want to know more about how to use Keynote on your Mac? Check out this MacMost course!
Can I get these flash cards on my phone, so I can study them while waiting in lines?
Bob: Why not? You can put Keynote on your iPhone and share the document via iCloud, etc.