-Set of 105 cards! -Great for tutoring or home-school instruction -Can be used in large or small groups Elapsed Time Flash Cards contain 105 double-sided cards with 3 levels of time intervals. These levels include hour and half hour, fifteen-minute, and five-minute intervals. On one side of a card, elapsed time is determined by comparing two analog clocks. On the reverse side of a card, it will compare two numbers in a digital format or compare times in words to determine the time elapsed. The set of cards include practice exercises and games to play using the flash cards.