TeachEngineering
Teach Engineering: Would You Drink That?
This activity focuses on getting students to think about bacteria, water quality and water treatment processes. Students develop and test their hypotheses about the "cleanliness" of three water samples prepared by the teacher. Then they...
NPR: National Public Radio
Npr: Dirty Work: Sewer Cleaners
Part of NPR's series called "Dirty Work," this site features a trip into the Cincinnati sewer system. Learn how sewer workers help improve our environment.