Guess My Rule
Player 1 creates an algebraic rule. One at a time, the other players give Player 1 an input. Player one enters the input and its corresponding output on the spreadsheet to create the points. When one of the other players thinks he knows the rule, he says, "I think I know the rule." Player 1 then gives the player an input. If the player can produce the correct output, Player 1 shows the rule and enters the players rule. If it is correct, the player wins and becomes Player 1 for the next round.