Create, present and share 3D models as images or movies, with Sketchup
SketchUp will help you create, share and present 3D models, such as a house deck or geometry models for your class.
You can export an image, make a movie or print out a view of what you made.
There are also commercial (Pro) plans of SketchUp, if you need more features.
SketchUp is well designed and convenient.