Quizlet is a free, online flash card maker. The possiblities here are endless. I can see using this to create cards of my kids' latest spelling words, science terms, new vocabulary, foreign language words, math sentences, geography landforms, continents & oceans, countries in South America/Europe/etc., important figures in history, names of the presidents, the 50 states, bones in the body, verbs, sight words...you get the picture.
It's fast. It's easy. And it's fun.
If you watched the video above, then I you also know that this is a perfect tool regardless of what language you speak!