These are some pictures of the guitar that I built in my middle school Tech Ed class in 2008. It was modeled after a Gibson Les Paul, with a mahogany back and curly maple top. I built the entire guitar myself except for the neck, as at that time I didn't have the skill to reliably create such a mathematically exact piece.
This is the guitar that I made for my Physics of Music class at UConn in 2012. It is made with body dimensions that efficiently respond to the frequencies created by the strings. While it is impossible to create a rectangular prism that will resonate ideally at all the frequencies a guitar can produce, this experiment helped me gain an understanding and appreciation of the curves of the standard acoustic guitar that have been perfected over the years.