The document introduces Google SketchUp, a free 3D modeling software from Google that is easy for students and teachers to use for subjects like math, art, science and design. It provides examples of simple projects involving 3D modeling, shadowing, and integrating SketchUp with Photoshop and Google Earth. Basic instructions are given for downloading and installing SketchUp on Windows or Mac systems, and resources like Google tutorials and YouTube videos are recommended for learning how to use the software.