Tinycards is a free service from Duolingo that provides quick review activities in your web browser or on your iPad. Tinycards are essentially multimedia flashcards with a few quiz questions interspersed between them. The idea being that students will flip through a few digital flashcards then answer a question or two to test their recall of the topic at hand.
In the geography section there is a collection of cards about the continents. Students flip a couple of cards that show students the name and relative location of a continent. After a couple of cards are flipped students are then asked a multiple choice question about the location of the continents. Then a few more cards are flipped and students have to answer a fill-in-the-blank question.