Slicing Fruit part of Spatial Thinking Workbook:Teaching Activities
Tom Hickson, University of St. Thomas (MN)
Students identify and draw slices through fruit, as practice for drawing slices through more complex features.

Slicing Cylinders part of Spatial Thinking Workbook:Teaching Activities
Carol Ormand Ph.D., Carleton College
Students identify and draw slices through cylinders and partial cylinders, and use gestures to visualize slicing planes. This practice with visualizing slices through idealized geometric shapes is preparation for visualizing slices through geological features.

Fault Separation part of Spatial Thinking Workbook:Teaching Activities
Carol Ormand Ph.D., Carleton College
Students use gestures to explore the relationship between fault slip direction and fault separation by varying the geometry of faulted layers and the slip direction.

Slices Through 3D Objects part of Spatial Thinking Workbook:Teaching Activities
Carol Ormand Ph.D., Carleton College
Students identify and draw slices through an ice cream cone, a pyramid, and a beverage six-pack.

Introduction to 3D Sketching part of Spatial Thinking Workbook:Teaching Activities
Tom Hickson, University of St. Thomas (MN)
This activity provides an introduction to 3D sketching. Students sketch a cube, boxes, and cylinders. They watch a video about how to sketch boxes and cylinders, and then sketch a few more.

Sketching Block Diagrams part of Spatial Thinking Workbook:Teaching Activities
Carol Ormand Ph.D., Carleton College
Students watch a video of the instructor sketching two geologic block diagrams (of flat stratigraphy and of an upright anticline), then practice sketching additional geologic block diagrams.

Understanding Polyhedral Diagrams part of Spatial Thinking Workbook:Teaching Activities
Carol Ormand Ph.D., Carleton College
Students identify individual polyhedra in a variety of diagrams and answer questions about shared oxygens in diagrams of common silicate structures.

Slicing Rocks part of Spatial Thinking Workbook:Teaching Activities
Tom Hickson, University of St. Thomas (MN)
Students examine images of a bowl of rocks, then several rock piles, then outcrops of conglomerate and breccia. They sketch slices through the bowl of rocks, match photos of rock piles to sketches of slices through those piles, and then apply what they've learned to describe the conglomerate and breccia.

Slicing Channels part of Spatial Thinking Workbook:Teaching Activities
Tom Hickson, University of St. Thomas (MN)
Students examine 3D channel-shaped objects and 2D slices through those objects. The purpose is to get them thinking about how the 3D geometry of a channel is reduced to a random 2D slice through the channel in a typical outcrop, so that they can recognize channel deposits.

Sketching 3D Ripples and Dunes part of Spatial Thinking Workbook:Teaching Activities
Tom Hickson, University of St. Thomas (MN)
Students watch a video of the instructor sketching 3D ripples, then practice sketching 3D bedforms, both as seen by the viewer and as annotated 3D block diagrams.