| TITLE | Vol.Issue# | Date | pg# |
| 1, 2, 3, 4, Ominoe | 14.4 | June 1990 | 34-35 |
| 3-D Model Puzzle | Spec Ed | 1998 | 42 |
| A Balancing Act | 18.4 | June 1994 | 4041 |
| A Cone Activity for Many Grade Levels | 22.2 | Dec 1997 | 4647 |
| A Day in the Life of K and J | 15.3 | Mar 1991 | 19 |
| A Day in the Life of K and J | 15.4 | June 1991 | 24-25 |
| A Different Angle | Spec Ed | 1992 | 11-13 |
| A Discrete Interface with Geometry | 21.1 | Sept 1996 | 48-49, 50-51 |
| A Four-Step Process for Meeting the Needs of All Students in the Geometry Classroom | 16.2 | Dec 1991 | 25-27 |
| A Geometry Lesson for English Language Learners (ELL): An Adaptation of a Brazilian Mathematics Lesson | 29.4 | June 2005 | 3032 |
| A Geometry Problem Solved Algebraically | 13.4 | June 1989 | 30-31 |
| A Golden Cross of St. Andres | Spec Ed | 2002 | 5860 |
| A Hexagonal Truffle Box | Spec Ed | 2003 | 5760 |
| A Historical Theorem About Six Circles | 14.4 | June 1990 | 21 |
| A Present: A Song about Geometric Shapes | 21.2 | Dec 1996 | 35-36 |
| A Students Alternative Construction of an Altitude | 16.3 | Mar 1992 | 26 |
| A Surprising Difference | 21.2 | Dec 1996 | 25 |
| A Visual Approach to Continued Fractions | 31.4 | June 2007 | 3234 |
| ABCs of Geometry | 24.1 | Sept 1999 | 41 |
| Algebraic Proof | 26.2 | Dec 2001 | 5758 |
| Alternative Proof of the Right Triangle Inscribed in a Circle | Spec Ed | 200708 | 3640 |
| American Indian Recurring Geometric Patterns | 14.1 | Sept 1989 | 19-21 |
| An Activity Using the Tangram Magician | 17.4 | June 1993 | 50 |
| An Area Investigation | Spec Ed | 2002 | 6163 |
| An Easier Algorithm for Solving Pythagorean Theorem Problems | 13.3 | Mar 1989 | 34-35 |
| An Exploration in Three Strands: Algebra, Geometry, and Number Sense | Spec Ed | 2001 | 3940, 4344 |
| An Intuitive Approach to Regular Polygons and Circles | 28.3 | Mar 2004 | 39 |
| An Origami Puzzle | 21.2 | Dec 1996 | 55 |
| An Origami-Fold Book | Spec Ed | 1992 | 27-29 |
| Anamorphic Alphabet Art | Spec Ed | 1997 | 2425, 26 |
| Angles in Regular Polygons | 15.2 | Dec 1990 | 43-44 |
| Angles On Time | Spec Ed | 200708 | 28 |
| Ant Corrals | 27.3 | Mar 2003 | 52 |
| Architect/Builder: Team Work! | 16.3 | Mar 1992 | 54 |
| Arcs on a Sphere | 19.1 | Sept 1994 | 39-40 |
| Area Application | 23.4 | June 1999 | 5556 |
| Area in a Coordinate Plane | 23.3 | Mar 1999 | 5758 |
| Around the World with Trigonometry | 32.2 | Dec 2007 | 5658 |
| Art, Geometry, and the Perfect Shape | 27.1 | Sept 2002 | 3638 |
| Baggie Books | Spec Ed | 1992 | 26 |
| Bakuba! | Spec Ed | 1998 | 4345 |
| Betsy Ross Star | Spec Ed | 200708 | 4748 |
| Beyond Pentominoes: Exploring Shapes with Equilateral Triangles | Spec Ed | 1992 | 47-48 |
| Block City: A Poem for Builders | Spec Ed | 1992 | 32-33 |
| Brochure Puzzle | Spec Ed | 2000 | 4445 |
| Build Your Own Tangent Table | 17.1 | Sept 1992 | 41-42 |
| Building Blocks for Learning | Spec Ed | 1997 | 1011 |
| Building Quadrilaterals | 14.4 | June 1990 | 49, 52 |
| Building Rectangles: An Algebra Tile Game | Spec Ed | 2001 | 5152, 5354 |
| Calculator Line Designs | 25.2 | Dec 2000 | 51, 53 |
| Can You Find Someone Who
| Spec Ed | 1994 | 26, 28-29 |
| Celebrate Pi Day | 32.3 | Mar 2008 | 4950, 5253 |
| Circle Books, the Unfolding Story | Spec Ed | 1999 | 50 |
| Circle Review | Spec Ed | 2004 | 57, 58 |
| Circles, Ellipses, Polygons, and Stars | 21.4 | June 1997 | 54-55 |
| Classification of Triangles | 21.2 | Dec 1996 | 50, 51-52 |
| Classifying Quadrilaterals | 21.2 | Dec 1996 | 45, 46-47 |
| Clock Angles | 16.3 | Mar 1992 | 38, 42 |
| CMC Student Problem Solving Activities: A Square Number | 28.2 | Dec 2003 | 58 |
| CMC Student Problem Solving Activities: Artistic Symmetry | 27.1 | Sept 2002 | 54 |
| CMC Student Problem Solving Activities: Colored Cubes | 21.2 | Dec 1996 | 59 |
| CMC Student Problem Solving Activities: Colored Platonics | 21.2 | Dec 1996 | 59-60 |
| CMC Student Problem Solving Activities: Cutting Cake | 27.4 | June 2003 | 57 |
| CMC Student Problem Solving Activities: Cutting Cake | 28.1 | Sept 2003 | 57 |
| CMC Student Problem Solving Activities: Figure This | 19.3 | Mar 1995 | 54-55 |
| CMC Student Problem Solving Activities: Fill It Up | 19.4 | June 1995 | 56, 59 |
| CMC Student Problem Solving Activities: Flat Stanley | 19.1 | Sept 1994 | 54 |
| CMC Student Problem Solving Activities: Holiday Decorations | 22.2 | Dec 1997 | 59 |
| CMC Student Problem Solving Activities: How Long is the Crease? | 23.4 | June 1999 | 58 |
| CMC Student Problem Solving Activities: Magic Blank Rectangle | 29.4 | June 2005 | 57 |
| CMC Student Problem Solving Activities: Magic Blank Rectangle | 29.4 | June 2005 | 58 |
| CMC Student Problem Solving Activities: Optical Illusions | 26.1 | Sept 2001 | 54 |
| CMC Student Problem Solving Activities: Parametric Art | 21.4 | June 1997 | 58 |
| CMC Student Problem Solving Activities: Playground Geometry | 28.3 | Mar 2004 | 59 |
| CMC Student Problem Solving Activities: Seeing Math in Art | 27.1 | Sept 2002 | 5455 |
| CMC Student Problem Solving Activities: Shape Pictures | 28.3 | Mar 2004 | 59 |
| CMC Student Problem Solving Activities: Shape Scavenger Hunt | 26.1 | Sept 2001 | 53 |
| CMC Student Problem Solving Activities: Shape Symmetry | 17.3 | Mar 1993 | 58 |
| CMC Student Problem Solving Activities: Square Triangles, Part 1 | 21.2 | Dec 1996 | 58 |
| CMC Student Problem Solving Activities: Square Triangles, Part 2 | 21.2 | Dec 1996 | 58-59 |
| CMC Student Problem Solving Activities: Squares and Circles | 22.4 | June 1998 | 5758 |
| CMC Student Problem Solving Activities: Tessellation Investigation | 24.1 | Sept 1999 | 54 |
| CMC Student Problem Solving Activities: The Ladder Problem | 28.2 | Dec 2003 | 58 |
| CMC Student Problem Solving Activities: Tiling a Rectangle | 29.2 | Dec 2004 | 57 |
| CMC Student Problem Solving Activities: Triangular Phone Numbers | 17.3 | Mar 1993 | 58 |
| CMC Student Problem Solving Activities: Twos, Fours, and Eights | 19.2 | Dec 1994 | 58, 60 |
| CMC Student Problem-Solving Activities: Polygon Pattern | 31.3 | Mar 2007 | 60 |
| CMC Student Problem-Solving Activities: Right Triangle Puzzle | 31.1 | Sept 2006 | 54 |
| CMC Student Problem-Solving Activities: Triangle in a Square | 32.3 | Mar 2008 | 59 |
| Comparing Areas | 15.3 | Mar 1991 | 38, 40 |
| Congruent Triangles | Spec Ed | 200708 | 4951 |
| Connecting Geometry and Algebra through Graphing | Spec Ed | 1997 | 3740 |
| Connecting Geometry and Factoring | 19.1 | Sept 1994 | 40-41 |
| Connecting Statistics and Geometry | Spec Ed | 1993 | 22, 24-25 |
| Cooperative Symmetry | 14.4 | June 1990 | 53 |
| Corner Pyramids | 28.3 | Mar 2004 | 5758 |
| CornersLooking for Right Angles | 15.3 | Mar 1991 | 21 |
| Correction: Geometry Bingo Activity | 30.4 | June 2006 | 5758 |
| Correction to Special Edition 2004 | 30.1 | Sept 2005 | 23 |
| Covering Algebra and Geometry with a Class Quilt | Spec Ed | 2002 | 35, 8 |
| Crazy Areas | Spec Ed | 200607 | 5961, 62 |
| Creating a Right Angle | Spec Ed | 200708 | 3233 |
| Creating Equilateral Triangles | Spec Ed | 2003 | 6162 |
| Crisis at the Candy Factory | 25.3 | Mar 2001 | 5253, 55 |
| Crossing the Strands with Patterns | 20.2 | Dec 1995 | 48-49 |
| Cube Nets | 11.3 | Dec 1986 | 15 |
| Cube Patterns | 14.4 | June 1990 | 23 |
| Cube Patterns and Functions | Spec Ed | 1991 | 30-31, 32 |
| Cut a Rectangle | Spec Ed | 1991 | 46 |
| Describe What You See | 19.1 | Sept 1994 | 51-52 |
| Design a Flashlight Reflector | 13.3 | Mar 1989 | 26 |
| Design Ideas Using the Golden Ratio | 16.2 | Dec 1991 | 55, 57 |
| Design Your Own Spaceship! | Spec Ed | 1992 | 14-15 |
| Designing a Raceway | 27.3 | Mar 2003 | 5557 |
| Designing the Bedroom of Your Dreams | 26.4 | June 2002 | 4550 |
| Designs Based on Nested Squares | 17.1 | Sept 1992 | 44-45 |
| Developing and Understanding Mathematical Language | 32.1 | Sept 2007 | 4849 |
| Developing Geometric Ideas and Spatial Awareness Using Power Blocks | 19.1 | Sept 1994 | 36-37 |
| Diagonals of a Rectangle | 12.2 | Dec 1987 | 30 |
| Dilations | 22.4 | June 1998 | 5051 |
| Do Solutions Always Exist in Geometry? Ask Dynamic Geometry Software | 26.1 | Sept 2001 | 4952 |
| Double the Bubble Learning: Geometry through Science | 21.2 | Dec 1996 | 41-44 |
| Dowel Designs | Spec Ed | 1993 | 32-33 |
| Draw a Segment: A Geometry and Logic Game | 13.1 | Sept 1988 | 27 |
| Drawing Board Geometry | 24.3 | Mar 2000 | 4243 |
| Drawing Conics: A New Approach Based on an Old Idea | 16.3 | Mar 1992 | 43-47 |
| Drawing with da Vinci | 15.4 | June 1991 | 39 |
| Eight Paper-Folding Steps to the Pythagorean Theorem | 28.3 | Mar 2004 | 5152, 5556 |
| Ellipses You Can Make in a Restaurant | 29.2 | Dec 2004 | 5155 |
| Enrichment Constructions for Geometry | Spec Ed | 200708 | 5556 |
| Estimating, Approximating, and Finding Exact Lengths in Special Right Triangles | 15.3 | Mar 1991 | 53-55 |
| Exploring Angles within Triangles | Spec Ed | 1994 | 47-48 |
| Exploring Area and Perimeter with Tangrams | Spec Ed | 200708 | 5254 |
| Exploring Blocks: Only in Kindergarten? | 16.3 | Mar 1992 | 24-25 |
| Exploring Circles | Spec Ed | 2002 | 43 |
| Exploring Functions and Limits with a Calculator | 15.2 | Dec 1990 | 37-39 |
| Exploring Polygons with The Greedy Triangle | 26.1 | Sept 2001 | 4344, 4546 |
| Exploring "Proofs in the Making" | 14.4 | June 1990 | 18-19 |
| Exploring Spirolaterals | Spec Ed | 1999 | 37, 3839 |
| Figurate Numbers and Informal Proofs | 20.4 | June 1996 | 48, 50-52 |
| Fill Your Baggie Quilt | Spec Ed | 2002 | 57 |
| Filling a Circle with Polygons | 16.2 | Dec 1991 | 44-45 |
| Finding Special Lines of a Triangle in Multiple Ways | 24.2 | Dec 1999 | 47 |
| Finding the Area of a Triangle | Spec Ed | 2004 | 5556 |
| Finger Math | 23.3 | Mar 1999 | 4041 |
| Flat Stanley: Working with Two and Three Dimensions | 19.1 | Sept 1994 | 42-43 |
| Flatland: A Geometry Project | 26.1 | Sept 2001 | 39-40 |
| Flatland: A Geometry Project | 26.2 | Dec 2001 | 3637 |
| Flatland: A Geometry Project | 26.3 | Mar 2002 | 3435 |
| FLATLAND: The Movie | 31.3 | Mar 2007 | 60 |
| Flies and Functions: Geometry and Algebra with the Cartesian Coordinate System | Spec Ed | 2002 | 3337 |
| Floor Tile Tessellations | Spec Ed | 1999 | 5455 |
| Fold and Cut Problem Solving in Symmetry | Spec Ed | 1995 | 18, 21 |
| Folded Circle Shapes | Spec Ed | 1994 | 43 |
| Folded Gift Boxes | Spec Ed | 1992 | 29-30 |
| Folding a Cuboctahedron | Spec Ed | 2002 | 4547 |
| Folding an Origami Star | Spec Ed | 1998 | 33, 35 |
| Follow the Directions | 28.3 | Mar 2004 | 50 |
| Four in a Row | 13.1 | Sept 1988 | 24-25 |
| Fractions, Decimals, and Percents in Pointillism Art | 27.1 | Sept 2002 | 4447 |
| Fresh Air Geometry | Spec Ed | 1994 | 17 |
| From Puzzle to Proof | Spec Ed | 1999 | 5558 |
| Generalizing the Painted Cube Problem Using Algebra | Spec Ed | 2000 | 5657 |
| Geo-Grapher | Spec Ed | 1994 | 41-42 |
| Geoboard Challenges | Spec Ed | 200708 | 2931 |
| Geoboards, Fence Posts, and Trees | 14.4 | June 1990 | 49-51 |
| Geometric Optics | 16.4 | June 1992 | 52-54 |
| Geometric Quilts | Spec Ed | 2004 | 52 |
| Geometric Shape Collages | 32.4 | June 2008 | 43 |
| Geometric Square Dance | Spec Ed | 2002 | 1213 |
| Geometric Stained Glass | 15.3 | Mar 1991 | 32, 34-35 |
| Geometric Transformations | Spec Ed | 1989 | 32-33 |
| Geometry 1990 | 14.4 | June 1990 | 19-20 |
| Geometry Art Exploration | 18.1 | Sept 1993 | 54 |
| Geometry BINGO | 30.3 | Mar 2006 | 5457 |
| Geometry BINGO | 32.2 | Dec 2007 | 5255 |
| Geometry Concentration | 28.3 | Mar 2004 | 51, 5354 |
| Geometry Concentration | 30.1 | Sept 2005 | 5152 |
| Geometry Group Project: Researching a Mathematician | Spec Ed | 1998 | 36, 39 |
| Geometry in an Envelope | Spec Ed | 1992 | 21 |
| Geometry Lays an Egg | 24.3 | Mar 2000 | 52 |
| Geometry Mathematics Trails | Spec Ed | 2000 | 5455 |
| Geometry Project: Creating a Puzzle | Spec Ed | 1998 | 40, 41 |
| Geometry Quiz | 11.3 | Dec 1986 | 17 |
| Geometry Shape Activity | 16.3 | Mar 1992 | 48 |
| Geometry Shape Notebook | 28.3 | Mar 2004 | 4042 |
| Geopardy | Spec Ed | 1993 | 39-41 |
| Getting into Pyramids | 22.3 | Mar 1998 | 5658 |
| Gliding Ghost Problem | Spec Ed | 2002 | 62 |
| Grandfather Tangs Story: A Tale Told with Tangrams | 16.3 | Mar 1992 | 36-38, 39-41 |
| Group Topology: A Knotty Problem | 12.2 | Dec 1987 | 29 |
| Gullivers Crazy Quilt | Spec Ed | 1992 | 37-38 |
| Hands-on Formulas | Spec Ed | 2002 | 44 |
| Hard Hat Math | Spec Ed | 1998 | 1619 |
| Heart Construction | Spec Ed | 2000 | 5152 |
| Hexagonal Quilt | 18.1 | Sept 1993 | 51, 53 |
| Hexominoes | Spec Ed | 1988 | 31 |
| Hexominoes | Spec Ed | 1989 | 42, 44-45 |
| Hidden Squares Puzzles | Spec Ed | 1988 | 36-38 |
| Holiday Puzzles | 21.2 | Dec 1996 | 31-33 |
| How Big Is a Radian? | Spec Ed | 2000 | 60, 62 |
| How BIG Is That Angle? | Spec Ed | 1999 | 3031 |
| How to Use Origami in the Mathematics Class | 22.2 | Dec 1997 | 4142 |
| I Have
Who Has
? For Geometry Vocabulary | 19.1 | Sept 1994 | 46-47 |
| If You Look Around,
You Will Recognize Geometric Shapes | 19.1 | Sept 1994 | 50 |
| Interlocking Hearts | Spec Ed | 1994 | 44 |
| Internet Resources | 25.1 | Sept 2000 | 19 |
| Investigating Kernels vs. Popcorn | Spec Ed | 1997 | 5354 |
| Investigating Paper Airplanes | Spec Ed | 1991 | 8 |
| Investigating Surface Area and Volume Using a "Box" of Rolled Oats | 22.4 | June 1998 | 4243 |
| J and K: BrahmaWho? | 29.2 | Dec 2004 | 4445 |
| J and K: Looking for Mean Proportionals (Part 2) | 25.2 | Dec 2000 | 4243 |
| J and K: Looking for Mean Proportionals (Part 3) | 25.4 | June 2001 | 3941 |
| J and K: More Stars in Their Eyes | 28.2 | Dec 2003 | 3738 |
| J and K: Plop Goes the Polygon | 29.1 | Sept 2004 | 4647 |
| J and K: Polygonal Areas? A Snap (Part 1 of 4) | 22.4 | June 1998 | 3941 |
| J and K: Stars in Their Eyes | 21.1 | Sept 1996 | 30-32 |
| J and K: What a View | 28.4 | June 2004 | 3839 |
| J and K: Why Are Manhole Covers Round? | 24.1 | Sept 1999 | 3839 |
| Jumbo Spinning Top | 24.4 | June 2000 | 5657 |
| Jump Down: A Song about Shapes | Spec Ed | 2002 | 14 |
| K12 Activities with a Folded Paper Box | Spec Ed | 1999 | 45 |
| Leos Lines | 13.2 | Dec 1988 | 36, 39 |
| Lets Construct Our Neighborhood | 28.3 | Mar 2004 | 4345 |
| Letter to the Editor | 28.4 | June 2004 | 13 |
| Lines of Symmetry Nametags | Spec Ed | 2004 | 29 |
| Lon Po Po Mathematics | Spec Ed | 2000 | 2526 |
| Looking for Patterns in Embedded Squares | Spec Ed | 2001 | 4042, 45 |
| Make a Hexa-Flexagon | Spec Ed | 1990 | 48, Bk Cov |
| Make a Triangle | 10.4 | Dec 1985 | 10 |
| Math Alphabet Challenge | Spec Ed | 1997 | 24 |
| Math and Art | Spec Ed | 1990 | 48 |
| Math in Motion: Origami in the Classroom | Spec Ed | 1995 | 1820, 22 |
| Mathematical Paper Folding Explorations Based on 30° and 60° Angles | Spec Ed | 2004 | 4142, 4546 |
| Mathematics in the Garden: Exploring Areas of Leaves | Spec Ed | 2004 | 1214 |
| Mathematizing California | 18.1 | Sept 1993 | 50, 52 |
| Maximum and Minimum Investigations with 3X5 Cards | 14.4 | June 1990 | 41, 43 |
| Maze Making on Grid Paper | 14.4 | June 1990 | 48 |
| MCTM Bulletin Problem Page | Spec Ed | 2003 | 54, 56 |
| Measurement with Geoboards | 27.4 | June 2003 | 5253 |
| Measurement/Fraction/Artwork Project | 21.2 | Dec 1996 | 54 |
| Measuring Pi | Spec Ed | 2004 | 35 |
| Metric Spiral | 18.2 | Dec 1993 | 43 |
| Michael's Milk Carton Boats | 21.2 | Dec 1996 | 38-40 |
| Midpoint Polygons | 28.3 | Mar 2004 | 3537 |
| Milk Carton Blocks: A Free Manipulative | Spec Ed | 1997 | 1720 |
| Mirror Magic | 14.4 | June 1990 | 37 |
| Mirror Symmetry | 16.3 | Mar 1992 | 53 |
| Modular Math + Matrix = Art | 13.3 | Mar 1989 | 39-41 |
| Monte Carlo Methods with a Spreadsheet | 27.3 | Mar 2003 | 4144 |
| Motivating Mathematics | 15.4 | June 1991 | 42-43 |
| My Best Shot | 26.1 | Sept 2001 | 40 |
| My Cat Likes to Hide in Boxes | Spec Ed | 1990 | 30 |
| Native American Masks | Spec Ed | 1990 | 5 |
| Natures Geometry | 16.4 | June 1992 | 48-49 |
| Nonroutine Problems in Geometry | 21.4 | June 1997 | 41-42 |
| Nugget Exchange | 19.4 | June 1995 | 35 |
| Nugget Exchange: Geometry Collage | 23.1 | Sept 1998 | 51 |
| Nugget Exchange: Geometry Meets Reality | 19.2 | Dec 1994 | 41 |
| Nugget Exchange: Geometry Project | 23.2 | Dec 1998 | 42 |
| Nugget Exchange: Gumdrop Geodomes | 24.3 | Mar 2000 | 52 |
| Nugget Exchange: Portable Protractors | 21.2 | Dec 1996 | 23 |
| Nugget Exchange: Three-Dimensional LEGO Models | 26.3 | Mar 2002 | 39 |
| Number Sense through Olympiad Problems | 32.4 | June 2008 | 52, 5354 |
| Oblong Number Investigation | Spec Ed | 2004 | 5354 |
| Octagon Star Activity | 17.2 | Dec 1992 | 49 |
| Origami for the Occidental Educator | 12.2 | Dec 1987 | 32-33 |
| Orthogonal and Isometric Drawing | 14.4 | June 1990 | 40-41 |
| Over the EdgeA Challenge! | Spec Ed | 1997 | 25 |
| Paper Cup Mathematics | Spec Ed | 2002 | 4851 |
| Paper Folding a Cube | Spec Ed | 1994 | 40-41 |
| Paper Plate Icosahedron | Spec Ed | 1998 | 40 |
| Parallel, Intersecting Lines | 14.4 | June 1990 | 44, 46-47 |
| Partitioning Polygons | Spec Ed | 1997 | 2123 |
| Pascals Pyramid and Models of Binomial Expansions, Part 2 | 24.1 | Sept 1999 | 50 |
| Pattern Block Art Gallery | 13.3 | Mar 1989 | 44 |
| Pattern Block Assessment | 22.2 | Dec 1997 | 5455 |
| Pattern Block Pizza Place | 16.3 | Mar 1992 | 48-49, 50-52 |
| Pattern Block Puzzles | Spec Ed | 2004 | 1011 |
| Pattern Block Recipes | 14.1 | Sept 1989 | 38-39 |
| Patterning with Elmer | Spec Ed | 200708 | 68 |
| Pentagon Construction | 14.4 | June 1990 | 28 |
| Pentagon Lantern | Spec Ed | 2003 | 2829, 31 |
| Pentomino Blocks | 14.4 | June 1990 | 22-23 |
| Pentomino Challenges | Spec Ed | 1997 | 2728 |
| Pentomino Puzzles | Spec Ed | 200607 | 5152, 5556 |
| Pepperoni Pizza Packing Puzzle | Spec Ed | 1999 | 37 |
| Perimeter Patterns with Pattern Blocks | Spec Ed | 2002 | 3840 |
| Perspective Constructions | 27.2 | Dec 2002 | 5758 |
| Perspective Drawing | Spec Ed | 1990 | 19 |
| Photo-ometry | 18.1 | Sept 1993 | 4849 |
| Physical Mathematics: Integrating Mathematics and Physical Education | Spec Ed | 1992 | 34-35 |
| Pick on a Triangular Geoboard: An Investigation for Middle School Students | Spec Ed | 1992 | 20-21, 22-24 |
| Pipe Puzzle | Spec Ed | 1994 | 45-46 |
| Pizza Pi | 15.4 | June 1991 | 32 |
| Pizzanometry | Spec Ed | 1995 | 4748 |
| Polar "Pseudo" Points | 21.2 | Dec 1996 | 27 |
| Polygon Assessment Using Pattern Blocks | 19.2 | Dec 1994 | 49 |
| Polygon Patterns | Spec Ed | 1997 | 2830 |
| Polygons and Line Segments | 32.3 | Mar 2008 | 4546, 4748 |
| Polyhedron | 11.3 | Dec 1986 | 18-19 |
| Polyiamonds, Cousins to Pentominoes? | 26.1 | Sept 2001 | 4142 |
| Pop-up Pyramid | Spec Ed | 1998 | 36, 3738 |
| Problem Solving with Pattern Blocks | 28.3 | Mar 2004 | 4849 |
| Project/Investigation: Mini Golf Course | Spec Ed | 1997 | 3536 |
| Proofs in Geometry | 16.3 | Mar 1992 | 4-5 |
| Properties of Shapes | 24.1 | Sept 1999 | 4850 |
| Proportional Quilts | 28.1 | Sept 2003 | 4952 |
| Proportional Reasoning in Geometry | Spec Ed | 1998 | 29, 3132 |
| Pyramids and the PSAT | Spec Ed | 2002 | 5657 |
| Quadrilateral Tiles | Spec Ed | 1999 | 5153 |
| Quadrilaterals from Diagonals | 14.4 | June 1990 | 44-45 |
| Quilt Block Mathematics | Spec Ed | 2003 | 3639 |
| Quilt Math | Spec Ed | 1990 | 29 |
| Quilting and Math: Perfect Together | Spec Ed | 2000 | 3536, 39 |
| Quilting Bees: Design a Quilt! | Spec Ed | 1991 | 28-29 |
| Random Rectangles | 17.4 | June 1993 | 42-43 |
| Ratio of Areas Investigation: Inscribed Polygons | Spec Ed | 2004 | 6162 |
| Reading, Writing, and Reasoning: Thoughts about GSE Geometry | 20.2 | Dec 1995 | 26 |
| Recognizing Road Sign Attributes | Spec Ed | 2003 | 57, 8 |
| Reflections of Seventh Grade | Spec Ed | 200708 | 3335 |
| Regular Hexagon Puzzle | 22.4 | June 1998 | 49 |
| Relating Angles and Triangles | 12.2 | Dec 1987 | 23 |
| Revisiting Geometry in an Envelope | 30.2 | Dec 2005 | 5556 |
| Seeing Symmetry | 13.1 | Sept 1988 | 18 |
| Shape Puzzles | 14.4 | June 1990 | 41-42 |
| Shape Up, In and Around | 22.1 | Sept 1997 | 45 |
| Shapes and Patterns | 28.3 | Mar 2004 | 4647 |
| Shaping Up! | 18.3 | Mar 1994 | 44 |
| Shifting Shapes | 14.4 | June 1990 | 39 |
| Sierpinskis Pyramids | Spec Ed | 200708 | 5761 |
| Silent Cooperation | 12.3 | Mar 1988 | 15-17 |
| Silent Geometry | 14.4 | June 1990 | 31-33 |
| Soma Cube Puzzles | Spec Ed | 1999 | 6263 |
| Some Thoughts on Finding the Area of a Triangle | 18.3 | Mar 1994 | 23 |
| Somebody's Taking My Shapes Away | 21.3 | Mar 1997 | 47-48 |
| Spatial VisualizationSome Background Information | 19.1 | Sept 1994 | 25 |
| Spatial Visualization: Who Needs It? | 23.4 | June 1999 | 45 |
| Spider Angles | 21.1 | Sept 1996 | 40-41 |
| Sprouting Stained Glass | Spec Ed | 1995 | 23 |
| Square and Triangle Books | 13.1 | Sept 1988 | 20-22 |
| Squares from Rectangles | Spec Ed | 1998 | 4647, 4950 |
| Stake Out | 21.2 | Dec 1996 | 50, 53 |
| Star Trek: The Lost CrewA Construction Project | Spec Ed | 2003 | 5354, 55 |
| Straight from the Geometry Can | Spec Ed | 1993 | 67 |
| Student Work: The Square: Rhombus for Some, Reality for Others | 12.3 | Mar 1988 | 13 |
| Students Strategies for Finding the Area of Trapezoids | 28.3 | Mar 2004 | 3234 |
| Symmetrical Stained Glass | Spec Ed | 1995 | 24 |
| Taking Mathematics Out of the Shadows | 30.4 | June 2006 | 2933 |
| Tangram Equations | Spec Ed | 2001 | 3538 |
| Tangram Ratios | 26.1 | Sept 2001 | 4749 |
| Tangrams | 20.2 | Dec 1995 | 47 |
| Tangrams: Its More Than an Ancient Puzzle | 12.2 | Dec 1987 | 20-22 |
| Teaching Conceptual Abstractions at a Concrete Level | 19.1 | Sept 1994 | 29 |
| Teaching Spatial Visualization to Children and Adults | 14.1 | Sept 1989 | 22-24 |
| Tessellating T-Shirts | 14.4 | June 1990 | 26-27 |
| Tessellating Trees | 14.2 | Dec 1989 | 22-23 |
| Tessellation Pop-Up Book | Spec Ed | 1999 | 6162 |
| Tetrahedral Kites | Spec Ed | 200708 | 4446 |
| The Beauty of Geometry | Spec Ed | 2002 | 1720 |
| The Box Problem and the TI 82 Calculator | Spec Ed | 1998 | 33, 34 |
| The Chaos Game | Spec Ed | 2002 | 5253 |
| The Complete Unit Circle | Spec Ed | 200708 | 6264 |
| The Distance from a Point to a Line | 21.1 | Sept 1996 | 49, 52-53 |
| The Ellipse and Its Focal Points | 21.2 | Dec 1996 | 30-31 |
| The Golden Triangle | 11.3 | Dec 1986 | 16 |
| The "Hole" Thing | 10.4 | Dec 1985 | 8 |
| The Largest Volume | Spec Ed | 1988 | 43-44 |
| The Living Circle | 31.2 | Dec 2006 | 5051 |
| The Magic Book | 30.2 | Dec 2005 | 4647, 50 |
| The Math-Art Connection | 16.2 | Dec 1991 | 36-37 |
| The Robot Project | 21.2 | Dec 1996 | 49 |
| The Shape Debate | 13.2 | Dec 1988 | 30-32 |
| The Texas Problem | 21.3 | Mar 1997 | 54 |
| The Tonini Technique | 17.1 | Sept 1992 | 21 |
| The Wolfs Chicken Stew: Explorations of 100 | Spec Ed | 1992 | 8-10 |
| Three Dimensional Model | Spec Ed | 2000 | 5960, 61 |
| Three Square | Spec Ed | 1994 | 47, Bk Cov |
| TI-83 Animation Programs | 25.2 | Dec 2000 | 5456 |
| Tiling Pattern Possibilities: A Geometric Classroom Activity | 24.4 | June 2000 | 42 |
| Time for Clock Making | 23.2 | Dec 1998 | 54 |
| To See or Not to See | 19.1 | Sept 1994 | 4-5 |
| Toothpick Perimeter | 14.4 | June 1990 | 41 |
| Toothpick Squares and Triangles | Spec Ed | 1989 | 8, 10-11 |
| Toothpicks and Connectors | 22.3 | Mar 1998 | 5253 |
| Topology with Ropes and Corks | Spec Ed | 1997 | 5657 |
| Transforming Rectangles | 16.3 | Mar 1992 | 54-55 |
| Translation Images | 24.1 | Sept 1999 | 37 |
| Trap the Cube | Spec Ed | 200708 | 35 |
| Trapezoid Cover Up | 19.1 | Sept 1994 | 43-45 |
| Travel with Slope Tours | Spec Ed | 1993 | 6 |
| Tri Alpha Bits | Spec Ed | 1989 | 23, 25 |
| Triangle Investigation | Spec Ed | 1998 | 2527 |
| Triangle Mobile | 19.2 | Dec 1994 | 44 |
| Triangle Trigonometry?An Intriguing Approach | 15.3 | Mar 1991 | 22-25 |
| TrianglesAlike and Different | Spec Ed | 200708 | 1417, 20 |
| Triangular Tiling | Spec Ed | 1992 | 5-6 |
| Two Nonroutine Problems Involving the Golden Mean | 22.4 | June 1998 | 3839 |
| Two Pattern Block Recipes | Spec Ed | 2000 | 19, 2021 |
| Two-Handed Feely Boxes | 14.4 | June 1990 | 37 |
| Unifix-Geoboard Symmetry | 14.4 | June 1990 | 31 |
| Unifying Shapes | 27.1 | Sept 2002 | 4849 |
| Using Geometric Patterns | 21.2 | Dec 1996 | 34 |
| Using Poetry by Prelutsky and Silverstein to Teach Geometry | 28.3 | Mar 2004 | 32 |
| Visualize Those Hidden Lines | 14.4 | June 1990 | 38-39 |
| Visualizing Almost Parallel Lines | 19.1 | Sept 1994 | 38 |
| Visualizing Area Formulas | 19.2 | Dec 1994 | 34 |
| Visualizing Equal Angles | 16.4 | June 1992 | 43-45 |
| Walk Through a 3"X5" Card | 14.1 | Sept 1989 | 36-37 |
| Walking the Perimeter | Spec Ed | 1991 | 41, 45 |
| What a Parallelogram is Not | 21.2 | Dec 1996 | 28-29 |
| What a Parallelogram Is Not | Spec Ed | 200708 | 2226 |
| What Can It Be? | 14.4 | June 1990 | 34, 36 |
| What Shape Do Builders Use for Strength? | Spec Ed | 1991 | 33 |
| What to Do With an Index Card | Spec Ed | 2002 | 41 |
| Whats Wrong with This Picture? | Spec Ed | 1999 | 5860 |
| Wheel of Polygons | Spec Ed | 1995 | 40, 4344 |
| Why We Must Save Constructions | 24.1 | Sept 1999 | 42 |