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TeachEngineering
Teach Engineering: Portable Sundial
In this activity students will investigate the accuracy of sundials and the discrepancy that lies between "real time" and "clock time". They will track the position of the sun over the course of a relatively short period of time as they...
Utah Education Network
Uen: Trb 3:1 Investigation 5 Making a Sundial
Make a sundial and learn how to use it.
Exploratorium
Exploratorium:seasons/shadows: Investigate How Shadows Shift Throughout the Year
Ancient Chacoans used shadows to tell daily time and seasons. Build a model that demonstrates the changes in Earth's tilt that affect the length of shadows relative to the sun that determines the seasons. The lesson plan uses everyday...
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.