2009 
Area and Geometric Probability 
Grades 612 
Critter Constructions 
Grades 912 
Reasoning and Proof: A Logical Way of Thinking 
Grades 912 
2007 
CSI: Circleville 
Grades 912 
The Right Stuff 
HS Geometry 
2006 
Go With The Flow! 
Grades 912 
Similarity 
Grades 910 
2005 
Investigating Special Right Triangles and Area of a Regular Polygon 
HS Geometry 
A Trigonometric Path into the Land of Regular Pentagons 
Grades 912 
With Polygon, Who is Left to March? 
Grades 1012 
2004 
Pythagoras Wasn't Just a Square! 
Grades 911 
Quadrilaterals Aren't Just Squares 
Grades 812 
Quadrilaterals Still Aren't Just Squares!  Part II  The Sequel 
Grades 812 
2003 
Detective Slope 
Grades 912, Geometry and Algebra I 
Parallel Lines 
HS Geometry 
Tangents, Secants, and Chords...OH MY! 
HS Geometry 
2002 
At The Circus 
Grades 912 
Pythagorean Puzzle 
Grades 912 
Regular Pentagons, "Star Polygons", and The Golden Ratio 
Grades 912 
2001 
As the World Turns 
Grades 912 
Banneker Park 
Grades 912 
Estimating the Dimension of a Coastline 
Grades 811 
Midsegments and Beyond 
Grades 912 
2000 
What About Medians? 
Grades 910

1999 
Math and Art 
Grades 610 
Patterns, Patterns, Everywhere! 
Grades 912, Advanced Geometry, Algebra II, Precalculus, Calculus, Discrete Mathematics, and Statistics 
Squareston  The Use of Coordinate Geometry 
Grades 810, Activities 1  3
Grades 1012, Activity 4 
Stop This Runaway Truck, Please! 
Grades 812, Algebra I, Geometry, Algebra II, Trigonometry, PreCalculus 
Swimming Pool Construction 
Grades 910, Geometry 
Well Babe 
Grades 912, Geometry 
What's Your Angle? 
Grades 812, Algebra and Geometry 
1998 
A Pen for Penny 
Grades 812, PreAlgebra, Algebra I, Geometry 
Geometric Giants 
Grades 812, Geometry, Algebra 
Surface Area and Volume Ratios in Cells 
Grades 912 
...Dead Reckoning Air Navigation Problem 
Grades 912 
1997 
Geometric Mean Made Friendly 
Grades 812 
Going In, Out, and Around with Polygons 
Grades 912 
Isometries: Walkin' & Talkin', ... 
Grades 912, Geometry 
Points of Curcurrency in a Triangle 
Grades 812 
What's the Point?  A TI92 Investigation 
Grades 912, Geometry 
1996 
AngleArc Relationships in the Circle 
Grades 910 Geometry 
Darcy's Cove 
Grades 912, Geometry 
Exploring the Altitude Drawn... Right Triangle 
Grades 912, Geometry 
Inscribed Angles, Central Angles, ...Arcs 
Grades 912 
ParameTRICKS 
Grades 912 
Pythagorean Modernized! 
Grades 812 
Pythagorean Theorem and Its Converse 
Grades 912 Geometry 
Surfing the Web for Crystals and Polyhedra 
Grades 912 Geometry 
Tessellating with Triangles 
Grades 912 Geometry 
The Zit Theorem: Changing ... Trapezoids 
Grades 912 Geometry 
With Due Reflection 
Grades 912 Algebra and Geometry 
1995 
The Balancing Act 
Grades 912 Geometry 
Can You Can a Can? 
Grades 812 Geometry  Calculus 
Concurrent Events 
Grades 912 Geometry 
PolygonTessellation Exploration 
Grades 912 Geometry 
Regular Polygons: Computing the Area 
Grades 912 Geometry 
Surf'n Turf within Geometry 
Grades 912 Geometry 
Where Is the Treasure? 
Grades 912 Geometry and Algebra 