Lesson 4 - SI Senses. Structure and function of mammalian ear - focus on human. Slide 9 video is good as a whole but put in for 1.30 - 5min for good description of ossicles and sound amplification. Slide 11 and 12 are optional and more kid friendly explanations of whole process. They should be able to click on link from their devices to play the Quiz - should open via Quizizz. They would need to click on 'slides' button to bring up slide first. More activities then time so pick as you prefer.