Groups of students using a pair of dice must make it to the end of a game board (1-100) landing ONLY on prime numbers). Each student rolls the dice and uses the numbers they land on to try to get to the next prime number.
For example: a marker is on the number 2. The student rolls a 6 and a 1. The student cannot go 6, because 8 is not prime. The student could not add the numbers and go 7, because 9 is not prime. The student could subtact the numbers and go 5, becuase 7 is prime OR they could go 1 because 3 is prime.