Here is the course outline in a pdf file.
Here is a sketchup file of the arch bridge. Just change the extension from pdf to skp.
A pdf of the bridge dimensions.
First how to use layers in Sketchup.
And I bridge I did.
I thought I would upload my Sketchup Course for those new to 3D software. (Sketchup is now owned by Trimble.)
Here is the first week lesson plan in a pdf file.