In addition to what the others have said, there's a decent document that was put together by myself and other alumni and members of 1257.
http://team1257.org/FRCPenultimateManual.pdf
The most updated version is avalible on GitHub as a Markdown file.
https://github.com/MC42/FRCPenultima...imateManual.md
It aims to cover some of the less-apparent parts of FRC, like awards, coordination of events, strategy and some leadership (from a mentor's perspective).
Best wishes and luck to you, and good luck to your new head mentor.