PRXer Becca Nesson describes her experience and her group’s hack day idea on the PRX blog:

The open-source Free Rice project was an idea I contributed in the first round.  It’s an idea that my father and I have been interested in for years and it seemed like a good fit for the day.  I was happy to see it progress through the rounds of winnowing.  Ultimately Matthew Battles of Metalab and Jeff Mao of the Maine Department of Education chose to work on it with me.  We spent some time discussing how we could make the project into something that school systems would be able to use and decided that ideally the system would be able to hook into an API provided by the testing company with which a school system contracts.  While Matthew and Jeff worked on ideas about the API and a presentation of the idea, I started to hack.