I love flashcards! I teach my children to use them for studying. They are perfect for breaking down a studyguide and you're able to use them on the go. We study in the car between classes during lunch etc. There's a lot of technology out there that can replace these cards but having to write it down helps you retain the information better. I recommend them to all students of all ages.
The cards are very useful for the purpose we bought them for. We use them at our church to keep a second copy of our membership roll. These cards are very handy for someone who is not computer literate. They are also very handy if you need to look up a member's information at a time when your computer is not in use.