Their work — some with supporting documents such as Geometer's Sketchpad sketches, others published in the journal <i>Mathematics Teacher</i> — includes</p><ul><li>Millennium Force Rollercoaster</li><li>Wheelchair Ramp</li><li>The Chaos Game</li><li>Dynagraphs</li><li>Sliders in Sketchpad</li><li>Think, Communicate, Justify</li><li>Bead Patterns</li><li>Greedy Bear Story</li></ul></fon