Submarine Math Race is FREE for a limited time. Kids can practice the 4 basic operations – addition, subtraction, multiplication, and division by racing their submarine against various sea animals. There are two modes in this app – play and practice. In the practice mode you can choose the operation and level of difficulty. The child taps the answer to advance the submarine and win the race. After completing 10 problems, a score is given followed by number right vs number wrong (which was not always accurate). Then there is the “try again” screen – sometimes that came up instead of number right vs number wrong, sometimes it came up instead of advancing to the next level of the game or as a new level was supposed to begin. Also, the app is connected to the Game Center so it constantly reminds you to log in – whether you want to or not. I had lots of problems using this app so I cannot recommend downloading at this time.