There are a total 13 different relays, including solving by substitution, elimination, graphing, systems of inequalities, and linear programming. This is a great activity to use to practice how to do these problems that students find complicated. Students sit in rows or groups and 1 student does one step, then passes the paper to the next person. They may not talk or help each other until they show their answer to you. If their answer is incorrect, then they may work together to fix it. Also, when they get the paper, they may check their group members' work, but they may not work ahead.
They love this and really get into it...so it makes learning fun!