As far as what my college training entailed: Every weekday there was a 4 hour block of hands-on classes at the barn (either Western or English barn - you could only select one,) plus your regular college classes (math, science, computers, equine science, equine nutrition, macroeconomics, barn management, etc) on campus. Evenings & weekends were spent at the barn for extra work with your assigned horses, or to help feed and clean stalls. You fit your book studying in where possible.
Freshman year: rotated through the school horses to master groundwork, medical care, judging conformation/suitability, mastering riding skills on finished horses, determining what discipline a lightly started colt should be finished in, properly preparing horses for show, taking horses on a trail ride, etc. Dabbled in showmanship, Western Pleasure, reining, cutting, trail, Hunter Under Saddle, western riding, etc. Up to 2 horses to work with daily.
Sophmore year: Assigned to 1-3 colts to start each semester, many of which were from outside clients. Some horses had never been handled, some had been spoiled by too much owner playing. Got them well trained on ground, under saddle, tieing, standing for farrier, trailer loading, standing to be bandaged, okay with clippers, standing for sheath cleaning, collection, or mare checking, etc. Maintained regular communication with the horses' owners, so they knew how training was progressing; some owners would come in for periodic rides or views. Final exam was held as a horse show.
Junior year: Assigned 1-3 horses to start or finish each semester, plus rotated through the cutting horse heard to learn about that discipline.
Senior year: Assigned 1-3 horses to start or finish each semester, plus rotated through the reining horse heard to learn about that discipline.
Participating in the show team was optional, but I would highly recommend it if you look at colleges with a team! More experience riding unknown horses, and winning gets your name out there if you're looking to work for a show trainer.
We had instructors who had been in the horse business for many years, plus seminars, guest speakers, and field trips to Quarter Horse Congress, Churchill Downs, etc. As much exposure to the huge horse world as possible. Things I never would have experienced had I just gone to work for a local trainer.