Algebra
Fifty-six Views of Salt Lake City (November 2008)
Slippery Slopes (September 2008)
Triangular Numbers (March 2008)
Parking garage, St. Louis, Missouri (January 2007)
Beer stein, Ho Chi Minh City, Vietnam (January 2006)
Iron gate, Metulla, Israel (October 2005)
Speedometer and odometer (May 2005)
Boston Globe vending box, Exeter, New Hampshire (April 2005)
Sol Lewitt sculpture: four-sided pyramid (February 2005)
Chandelier in Marriott Courtyard Hotel, Philadelphia (November 2004)
Chalkers Billiard Club, San Francisco (September 2004)
The Grassroots Club, Singapore (August 2004)
Calculus
Iron gate, Greenfield, Massachusetts (September 2006)
Ferris wheel, Erial, New Jersey (November 2005)
Iron gate, Metulla, Israel (October 2005)
Geometry
Fifty-six Views of Salt Lake City (November 2008)
Quilt Blocks (October 2008)
Reflections: Photograph Images (August 2008)
Library of Celsus, Ephesus, Turkey (May 2008)
Wagon, Luang Prabang, Laos (April 2008)
Star Polygons (February 2008)
Restaurant doorway, Tokyo, Japan (December 2007)
Heliconia Plant, Fairchild Tropical Botanic Garden, Miami, Florida (November 2007)
Arches at King Fahd University, Saudi Arabia (October 2007)
Cathédrale Notre-Dame de Strasbourg, Strasbourg, France (September 2007)
The Venetian Hotel, Las Vegas, and store on Orchard Road, Singapore (August 2007)
Cambodia, Philadelphia, India (May 2007)
Hotel Indigo, Chicago (April 2007)
The Alhambra, Granada, Spain (February 2007)
Parking garage, St. Louis, Missouri (January 2007)
House, Amherst, Massachusetts (August 2006)
U.S. Flag, American Airlines Arena, Miami, Florida (May 2006)
Spaceship Earth, Epcot Center, Orlando, Florida (April 2006)
Staircase railing, Eastern Illinois University, Charleston, Illinois (March 2006)
Clock, Marist High School, Chicago, Illinois (February 2006)
Beer stein, Ho Chi Minh City, Vietnam (January 2006)
Iron gate, Metulla, Israel (October 2005)
Hubcap display, Greenfield, Massachusetts (September 2005)
Decoration in Luang Prabang, Laos (August 2005)
Cannonballs, Little Rock, Arkansas (March 2005)
Sol Lewitt sculpture: four-sided pyramid (February 2005)
Side of a building, Montreal, Quebec (January 2005)
Boothby Harbor, Maine (October 2004)
Chalkers Billiard Club, San Francisco (September 2004)
Graphing
Arches at King Fahd University, Saudi Arabia (October 2007)
Ponte della Maddalena (March 2007)
Iron gate, Greenfield, Massachusetts (September 2006)
Cannonballs, Little Rock, Arkansas (March 2005)
Side of a building, Montreal, Quebec (January 2005)
Mathematical Connections (Architecture)
Library of Celsus, Ephesus, Turkey (May 2008)
House, Amherst, Massachusetts (August 2006)
Mathematical Connections (Physics)
Ponte della Maddalena (March 2007)
Boothby Harbor, Maine (October 2004)
Measurement
Fifty-six Views of Salt Lake City (November 2008)
Quilt Blocks (October 2008)
Reflections: Photograph Images (August 2008)
The Venetian Hotel, Las Vegas, and store on Orchard Road, Singapore (August 2007)
Taipei 101, Taipei, Taiwan (November 2006)
Patterns
Picnic Patterns (October 2006)
Chandelier in Marriott Courtyard Hotel, Philadelphia (November 2004)
Problem Solving and Reasoning
Cambodia, Philadelphia, India (May 2007)
Boston Globe vending box, Exeter, New Hampshire (April 2005)
Ratio and Proportion
Heliconia Plant, Fairchild Tropical Botanic Garden, Miami, Florida (November 2007)
Beer stein, Ho Chi Minh City, Vietnam (January 2006)
Statistics and Data Analysis
Picnic Patterns (October 2006)
Technology
Ponte della Maddalena (March 2007)
Iron gate, Greenfield, Massachusetts (September 2006)
Clock, Marist High School, Chicago, Illinois (February 2006)
Cannonballs, Little Rock, Arkansas (March 2005)
Time
The Venetian Hotel, Las Vegas, and store on Orchard Road, Singapore (August 2007)
Clock, Marist High School, Chicago, Illinois (February 2006)
Trigonometry
Wagon, Luang Prabang, Laos (April 2008)
Taipei 101, Taipei, Taiwan (November 2006)
Ferris wheel, Erial, New Jersey (November 2005)
Hubcap display, Greenfield, Massachusetts (September 2005)