This lesson plan is for a 30 minute Grade 3 science class on hearing and sound. The lesson objectives are for students to identify that some sounds are louder than others and that loud sounds can damage hearing. Assessments include observations of student understanding, worksheets, and a workbooklet. The lesson involves watching a video clip about how we detect sound, explaining how damage can occur to parts of the ear, and having students complete worksheets to graph sound levels and determine if sounds are safe, risky, or dangerous. The closure asks if students could recognize the difference between safe and dangerous sounds.