To explore plans and elevations you can use Wisweb applets from the Freudenthal Institute.
Try Cube houses to build 3d models and generate different views.
First select drawing to see the view then select 3d-model to give you a model you can rotate and look at the different views.
There are eight different models you can explore (use the drop down menu).
You can add (build) or remove (break down) bricks and control the size of the square base.
Building houses with side views challenges you to construct 3D models given the plans and elevations; the task is made more challenging by specifying that as few cubes as possible should be used.