Integrate Real-World STEM in your classroom and engage kids in a real world problem. Learn about Water Filtration with this Earth Day STEM Activity! Students learn about the water crisis and water pollution affecting nearly 1 billion people around the world and explore how water filters and other solutions can help. Connect to a Read Aloud: The Water PrincessThis STEM Project is a companion activity to The Water Princess by Susan Verde. The book explores the reality of how people walk for water