First Head coaching interview

A plan of how you will run your program from December-November. Outline your program. That's all you need.

I would have a "portfolio" that gives your ideas/philosophy on the following things:

OVERVIEW
PHILOSOPHY
WHAT I EXPECT FROM AN ASSISTANT COACH
WHAT ASSISTANT COACHES CAN EXPECT FROM ME
HEAD COACH RESPONSIBILITIES
VARSITY ASSISTANT RESPONSIBILITIES
FRESHMAN COACH RESPONSIBILITIES
WEEKLY PRACTICE BREAKDOWN
WHAT I EXPECT FROM PLAYERS
ACADEMICS
TEAM RULES
COMMUNITY RELATIONS

I highly doubt that they interviewing committee will ask you any questions on X's or O's. I would expect them to ask a lot of "what if..." questions. They want to find out how you will handle various situations (violations of team rules, academics, overbearing boosters, relationship with the band, etc).