The educational value of this activity is a great learning potential for elementary students. The quality of the content is organized, in-depth, and user friendly. The lesson provides various activities in understanding shadows, how the Earth rotates in relation to casting our shadows, also step by step instructions in constructing different types of sundials. If unable to access the materials from the site, then everyday items can be used – a shadow just needs to be cast with some patience and time. This activity is fun and engaging – good recommendation for understanding about shadows and sundials.