In this lesson, students are introduced to computer aided 3D modeling. A demonstration of 3D Modeling software will be given. AUTODESK INVENTOR or SOLIDWORKS will be used. An instructional video is included in the resources to get the students started in the 3D modeling process. Students will then use a 3D modeling program in guided practice lab sessions to create the pieces of their 3D puzzle project. They will also learn to generate drawing views - orthographic, isometric, exploded views - of their 3D puzzle, and how to print these drawings to a drawing sheet. In the next lesson they will learn how to assemble the pieces of their 3D puzzle using the same 3D modeling software.