Challenge 3: Fresh Water for Everyone Grade 4 Suggested Resources VIDEOS Use your Internet browser to search for videos to show during class using the terms “clean water” and “water sanitation.” Conduct this search prior to class to verify the content is appropriate for the class and the challenge. WEBSITES Houston Water Works Education Center https://www.publicworks.houstontx.gov/waterworks United Nations https://www.un.org Suggested keywords: World Water Day