As she’s a rising senior, she can and should seek career counseling from the chain of command at her det, her primary resource. Most AFROTC unit websites have info on grad school programs, see sample link below.
Additionally, there are numerous opportunities wit
www.colorado.edu
Generally speaking, the services offer both full-time student and after-hours grad school options. Full-time might be at a military degree-granting institution such as AFIT or even cross-service at the Naval Postgraduate School, or at a civilian university. Or, she could be on regular orders but use Tuition Assistance to fund a degree program after-hours at a local university, on-base at a university extension campus or a remote degree program.
Curriculums and degrees usually have to be in an approved area of study from an accredited institution, but the current policy will provide guidance. If retention is suffering, those restrictions on area of study can often be eased.
Again, generally speaking, if a military member gains a degree on their service’s dime or time, they will typically accrue more active duty obligated service (ADSO) time. This may run concurrently (yay) with ADSO they are currently executing or consecutively (oh no, pile it on). The current policy will be the definitive source of information.
There are other programs out there - Rhodes, Fulbright, Olmsted, etc.
After she separates or retires from military service, there are also the VA educational benefits which are easily researched at va.gov.