The Staircase Task. Kite Manufactorer Task. The Square and Hexagon Train Task. Area and Perimeter of Triangles (Part A) Area and Perimeter of Triangles (Part B) Minimizing Perimeter Task. Building a Pyramid with Cubes. Jolly Ranchers and Jaw Breakers. The Red-Blue Regions Task. The Hair-Growth Task. The Border Task. Circle and Intersecting Lines Task.