Flashcard app (like Magoosh)

I have hundreds of key terms, words and then definitions. I want to turn it into a flashcard app. Something similar to Magoosh GRE flashcards ([login to view URL]) It should show the key term and then when they press a button a button it should let them choose if "Yes they knew the definition" or "No I didn't know the definition". If they knew it, it should put the definition away. Please review the Magoosh app.