I found myself in the same boat recently.
If you use java, a great thing to teach basic syntax as well as basic algorithmic thinking is coding-bat (
www.codingbat.com).
Seeing as we have more time before build season starts, I also plan on wokring with the rookies with general java programming, as I feel that people who understand how to program in general are much better than people who can just program for robotics.
It may work to your advantage to work with new members on coding styles/practices as well, there's nothing worse than a religious war over tab sizes ruining your productive day.
Good luck!
