| 2009 |
| Area and Geometric Probability |
Grades 6-12 |
| Critter Constructions |
Grades 9-12 |
| Reasoning and Proof: A Logical Way of Thinking |
Grades 9-12 |
| 2007 |
| CSI: Circleville |
Grades 9-12 |
| The Right Stuff |
HS Geometry |
| 2006 |
| Go With The Flow! |
Grades 9-12 |
| Similarity |
Grades 9-10 |
| 2005 |
| Investigating Special Right Triangles and Area of a Regular Polygon |
HS Geometry |
| A Trigonometric Path into the Land of Regular Pentagons |
Grades 9-12 |
| With Poly-gon, Who is Left to March? |
Grades 10-12 |
| 2004 |
| Pythagoras Wasn't Just a Square! |
Grades 9-11 |
| Quadrilaterals Aren't Just Squares |
Grades 8-12 |
| Quadrilaterals Still Aren't Just Squares! - Part II - The Sequel |
Grades 8-12 |
| 2003 |
| Detective Slope |
Grades 9-12, Geometry and Algebra I |
| Parallel Lines |
HS Geometry |
| Tangents, Secants, and Chords...OH MY! |
HS Geometry |
| 2002 |
| At The Circus |
Grades 9-12 |
| Pythagorean Puzzle |
Grades 9-12 |
| Regular Pentagons, "Star Polygons", and The Golden Ratio |
Grades 9-12 |
| 2001 |
| As the World Turns |
Grades 9-12 |
| Banneker Park |
Grades 9-12 |
| Estimating the Dimension of a Coastline |
Grades 8-11 |
| Midsegments and Beyond |
Grades 9-12 |
| 2000 |
| What About Medians? |
Grades 9-10
|
| 1999 |
| Math and Art |
Grades 6-10 |
| Patterns, Patterns, Everywhere! |
Grades 9-12, Advanced Geometry, Algebra II, Pre-calculus, Calculus, Discrete Mathematics, and Statistics |
| Squareston -- The Use of Coordinate Geometry |
Grades 8-10, Activities 1 - 3
Grades 10-12, Activity 4 |
| Stop This Runaway Truck, Please! |
Grades 8-12, Algebra I, Geometry, Algebra II, Trigonometry, Pre-Calculus |
| Swimming Pool Construction |
Grades 9-10, Geometry |
| Well Babe |
Grades 9-12, Geometry |
| What's Your Angle? |
Grades 8-12, Algebra and Geometry |
| 1998 |
| A Pen for Penny |
Grades 8-12, Pre-Algebra, Algebra I, Geometry |
| Geometric Giants |
Grades 8-12, Geometry, Algebra |
| Surface Area and Volume Ratios in Cells |
Grades 9-12 |
| ...Dead Reckoning Air Navigation Problem |
Grades 9-12 |
| 1997 |
| Geometric Mean Made Friendly |
Grades 8-12 |
| Going In, Out, and Around with Polygons |
Grades 9-12 |
| Isometries: Walkin' & Talkin', ... |
Grades 9-12, Geometry |
| Points of Curcurrency in a Triangle |
Grades 8-12 |
| What's the Point? - A TI-92 Investigation |
Grades 9-12, Geometry |
| 1996 |
| Angle-Arc Relationships in the Circle |
Grades 9-10 Geometry |
| Darcy's Cove |
Grades 9-12, Geometry |
| Exploring the Altitude Drawn... Right Triangle |
Grades 9-12, Geometry |
| Inscribed Angles, Central Angles, ...Arcs |
Grades 9-12 |
| ParameTRICKS |
Grades 9-12 |
| Pythagorean Modernized! |
Grades 8-12 |
| Pythagorean Theorem and Its Converse |
Grades 9-12 Geometry |
| Surfing the Web for Crystals and Polyhedra |
Grades 9-12 Geometry |
| Tessellating with Triangles |
Grades 9-12 Geometry |
| The Zit Theorem: Changing ... Trapezoids |
Grades 9-12 Geometry |
| With Due Reflection |
Grades 9-12 Algebra and Geometry |
| 1995 |
| The Balancing Act |
Grades 9-12 Geometry |
| Can You Can a Can? |
Grades 8-12 Geometry - Calculus |
| Concurrent Events |
Grades 9-12 Geometry |
| Polygon-Tessellation Exploration |
Grades 9-12 Geometry |
| Regular Polygons: Computing the Area |
Grades 9-12 Geometry |
| Surf'n Turf within Geometry |
Grades 9-12 Geometry |
| Where Is the Treasure? |
Grades 9-12 Geometry and Algebra |