I saw this Q&A and you said "I then made five duplicates of the best version and loaned them to five high school teachers to use at home for two weeks. They loved them, so we went forward to production." Why did you choose high school teachers? Did you happen to pick five people and they were all high school teachers? It is super interesting. – From Hiroshi N.

The wife of our General Manager worked at a local high school and lined up the testers.