The adaptive mode in the testing module of Moodle works well. Does the same thing as the IFAT cards in that it tells students whether or not the chosen answer is correct and students can go back and choose a different answer for less credit. The adaptive mode allows the instructor to set how much less each subsequent attempt is worth. When I have used this feature I have simply released the quiz to only one students on each team who is then the designated "card scratcher" and then copy their result to the remaining team members once the quiz is completed.