On 229 we have a driver training handbook written by John and revised last year by Chris. I didn't feel the need to really revise any of it this year so it has remained unchanged so far.
http://www.team229.org/resources/single/110
Such as with all the documentation on our website, feel free to use this handbook or modify it to fit your needs as long as due credit is given to the makers.
Beginning the year who ever is elected strategy head starts training a group of any high schoolers who want to drive, or operate, and has them drive around old robots just to get the hang of driving a robot around. Then when the real season comes around we do some driver training with the fall drivebase on the new field with a practice mechanism while the new drive base is being made and then they continue to drive the new drive base up untill shipping. About the beginning of week 5 I made the decission on who the driver, operator, human player, and all purpose backup is. Now it is up to our field coach, John, to finish thier training with more specific match strategies. The driver selection system works out very well and you end up with competition drivers who have a lot of practice with the robot before the first regional.