PBS
Pbs Teachers: Patagonia: Glacier Maker: The Science of Glaciers
Identify the contents of a glacier like those found in Patagonia, construct a mini glacier model in class and compare and contrast the classroom model with Patagonian glaciers.
Curated OER
National Park Service: Varying Valleys
The NPS offers a good description of the three main types of valleys, lesson objectives, and modeling activities.