[T-Bird45]

Since the OP indicated her daughter has a strong inclination toward the USAF, perhaps sending her to the AFROTC website would be more prudent:

http://www.afrotc.com/program-requirements

Your response was more like the USMC PLC:

http://www.marines.com/becoming-a-marine/commissioning-programs/four-year-colleges/platoon-leaders-class?nav=LP1

[MasterGunner01]

In general, all college ROTC programs operate the same no matter the service selected; that is, Army, Navy, Marines, or Air Force. The first two years (freshman and sophomore) plus summer training are voluntary. Then, the cadet must decide whether he or she wants to commit to the summer training and junior and senior years. This requires that they must enlist and agree to a six year obligation after graduation. How that six year obligation breaks down generally depends on the length of in-service schooling after commissioning.

For example, a Navy ROTC graduate that selects the nuclear power field can expect to do a full six years on active duty because the school is 1-1/2 years long. A nuclear power school student obligates to a full six years on active duty. (This may be extended if the student applies for submarine duty.)

The ROTC programs (all services) will present cadets with many challenges and I highly recommend them to a high school graduate. The first two years and summer training will give the cadet at taste of whether they want a service career. If the cadet decides it is what they want to do, then they commit to the last two years a summer training and enlistment after commissioning. That the service picks up the total cost of the cadet's room, board, books, and tuition for the junior and senior years is a definite incentive.