This is a Kagan activity involving solving inequalities. Problems include multi-step inequality problems, graphing on a number line, and writing in both set and interval notation. Students work in groups of four. Each student has a different problem. All students complete step one on their sheet. Once complete, students pass their papers clockwise. They must check the students work on the paper they are receiving and correct/discuss any mistakes. After this, every student completes the next step/passes papers/checks work and continues until each step is done and everyone ends up with their own paper.
You could then group all students with the same problem together to discuss/check/put answers on the board. Add any other variation you find would fit your class!