Each group starts with an equation. They write a word problem for the equation. They pass the word problem to the next group and the next group writes the equation and solves the equation. They then pass their equation to the next group and the next group writes a word problem. You keep doing this until all groups do every equation alternating between writing a word problem and an equation. When finished each group gets back all of the word problems and equations that were written and compare them to their original equation. Like in the game Telephone or Gossip they usually see that the new equations are different from the original.