Covering and Surrounding
| Investigation | Lesson | Link |
| 3 - Constant Area, Changing Perimeter | 3.1 Building Storm Shelters | Virtual Manipulatives: Geoboard |
| 4 - Constant Perimeter, Changing Area | 4.1 Fencing Spaces | Virtual Manipulatives: Geoboard |
| Project Interactive: Area Explorer | ||
| 4.2 Adding Tiles to Pentominoes | Virtual Manipulatives: Geoboard |