When choosing a course for CAD/CAM for 3D printing, you need to consider the topics and skills it covers, its relevance and currency, and how well it matches your learning objectives. It's also important to look at the quality and clarity of the course materials, the instructor's credentials and experience, and reviews from previous students. You should choose a course that will teach you essential concepts and techniques, as well as some tips and tricks to enhance your results. Examples of CAD/CAM training programs for 3D printing include Fusion 360 for 3D Printing by Udemy, SolidWorks for 3D Printing by Lynda, SketchUp for 3D Printing by Skillshare, Blender for 3D Printing by CG Cookie, and Tinkercad for 3D Printing by Instructables. Each of these courses offers different features; for example, Fusion 360 teaches you how to use Fusion 360 to create sketches and modify models, SolidWorks teaches you how to use assemblies and mates, SketchUp teaches you how to use basic tools and commands, Blender teaches you how to use modeling tools and apply modifiers, and Tinkercad teaches you how to use basic shapes.