Curated OER
Sun and Shadows
Why do shadows look different in the summer than in the winter? What causes day and night? How can a sundial be used to tell time? Answer these questions and more through two engaging lessons about light and shadows. Fourth and fifth...
Harvard University
Eyes on the Sky, Feet on the Ground: The Earth's Rotation
Plenty of cool activities about the Earth's rotation can be found here, such as tracing shadows, observing shadows during different times of the day, and tracking the sun's path in the sky to understand the rotation of the earth.