Assess students' understanding of how proper handwashing prevents the spread of germs by testing knowledge of when to wash hands, the key steps (wet, lather with soap, scrub ~20 seconds, rinse, dry), and the cause-and-effect reasoning behind how soap, friction, and rinsing remove or inactivate germs; include simple scenario-based items appropriate for Pre-K–Grade 2 that require selecting correct behaviors and briefly explaining why those behaviors reduce transmission in classroom and home settings.