Practicing adding and subtracting rational expressions is made easy with this low prep, self-checking activity that will allow students to get out of their seats and move around the classroom as they solve 10 problems. Each problem solved will lead the students to a new problem to solve until they have solved all 10 problems. You will be amazed at the math talk you hear and the collaboration between students as they work on this activity! Just print out the posters and hang around the room or hallway!