Interactive Mathematics Program (1997)

Interactive Mathematics Program/Key Curriculum Press

The Interactive Mathematics Program, better known as IMP™, is an problem-solving-based alternative to the traditional sequence of high school math.

Key Curriculum Press published the textbooks for IMP. The IMP site (mathimp.org) is currently integrated into Key's main site, but in 1997 it was a free-standing site.

I used the IMP program catalog as my inspiration. You can see my preference for lots of white space beginning to emerge with this site.