From the developer: "Use the Datacation Math Flashcard system to learn basic math functions of Addition, Subtraction, Multiplication, and Division directly from your PC. Recommended for all ages. With old style hand held flashcards users had to manually flip cards over to reveal the answers. With Datacation flashcards the user clicks a button with their mouse to reveal the questions and correct answers. There are 231 flashcards in each of the flashcard math function programs (Addition, Subtraction, Multiplication, and Division) for a total of 924 flashcards in the Datacation Math Flashcard system! Obviously this can be a lot of mouse clicking after practicing a while. Selecting the hands free Strobe option can save your fingers and hands from cramping up after you've been clicking for some time. In the past a person using old style hand held flashcards would rely on shuffling the cards to increase their memory. Using the Datacation Math Flashcards users can choose the random option. The random option works the same as shuffling a traditional stack of hand held flashcards thus changing the order that the flashcards are presented giving the user a chance to test their memory of the questions and answers when they are presented out of sequence."