[delsaner]

Reasoning seems to change between different teams, depending on how education is passed down from mentors to students.

I know teams that have adults be the drive coach, so the students who are on the drive team are directly working with their mentors on the field.

I know teams (when I was on the drive team for my team) who have a student be the drive coach. After the match, the drive team sit down with the adults and discuss how the match went, pros/cons, etc.

Both of the reasons stated above have their benefits and their downfalls, it is just a matter of opinion. I am personally a fan of having a student be the drive coach for a few reasons.
1) It gives students an excellent opportunity to be on the field.
2) Important and on-the-spot decision making is a very handy ability to learn.
3) Adults can still be a part of the drive team, you just meet for 10 minutes outside the pits and discuss.

Once again, I would say it is up to how the team runs at competition. If you think an adult drive coach is a better way to teach students, go for it. If you think a student drive coach is better, go for it.