Interlochen will give her invaluable training and guidance. If she attends make sure she takes in her junior year: voice&diction and oral interpretation, and senior year: stage movement and acting shakespeare (along with the required acting technique and theatre company both years) those are the classes which will give her the most training for her 2 years there.
At the end of her junior year they will instruct her to have 10-12 monologues prepared for the fall of her senior year. They will expect most of these monologues to be memorized and ready to be worked in the private audition technique sessions to best prepare her for college auditions.
They will help her choose which colleges to apply to and in the entire college application process. They are very friendly with the heads of the departments at most of the conservatories and colleges, so if they have any questions about certain students they are always sure to ask.
The senior theatre majors take a charter bus to Chicago , to attend the Chicago Unified College Auditions (where most of the acting programs across the country/ world are in attendance). The teachers go with them to Chicago to help calm their nerves, be a guiding hand, and say hello to all the representatives from each college.
Most if not all of the seniors are accepted into great programs for college!
Do you know if your daughter will be auditioning for acting or musical theatre programs for college? If you know that, I can better assess the pros and cons of Interlochen for both.
Hope this helps