Slope Hot Seat Game - Students sit in lines of 4. Last person in each line gets cards with pos, neg, zero, undefined written on them. Teacher posts an equation on the board. The last person in the line chooses the kind of slope & passes that card to the person in front of them. The student looks at the answer and if they agree, they pass it up. If they disagree, they pass it back. When the 1st person in the line gets and agrees with the answer, they hold it up.