This document discusses Google SketchUp, a 3D modeling software that allows users to create 3D models. It can be used to teach students how to build 3D models of buildings, trees, cars and more. SketchUp helps students learn critical thinking, problem solving, geometry, collaboration and more. It can be integrated into multiple subjects and used to visualize mathematical concepts. The document provides an overview of the SketchUp interface and basic tools, and provides an example hands-on activity of using it to build a house model.