In this five-day unit, students explore the eye, light, and vision. They conduct a lab, compare parts and functions, watch a slideshow, stake notes, build models, and take a test to master standard 4-PS4-2 for NGSS and other states. Open the preview to take a closer look. You can view and download the lesson plans. They can be found in the right-hand column of this page. 5E Learning CycleEngage: What Is Necessary to See?Students experiment with a small object, a toilet paper tube, and a flashli