As part of the e-twinning project “Let's Stop the World Warming International Project (S.O.S) 2”, which we participated with our 6th grade students, we organized a water saving activity with our students for the 22 March World Water Saving Day. Under the supervision of our mathematics teacher Suada Özhan, our students examined the water bills that came to their homes. Our students, who created tables and graphs with the data they obtained, created awareness about the amount of water they use, and took steps to pay attention to the use of water at home. In the continuation of the post, you can see the poster works prepared by our students.