The best film school is not easy to define by scientific measures. Rather, choosing the best film schools is going to come down to the interest of students. If you as a film student are interested in attending acting school, then find a program with actors that will help you understand how to create a character or learn about method acting. If you are interested in becoming a producer, then film production schools will help you understand the technical aspects of creating a film. A global film school will help you broaden your horizons as a student of the craft of film.
The top film school for you should be easy to locate once you decide on a specific role within the film industry you would like to pursue. If you know a student that is currently attending one of the top film schools for your interests, ask that student all you can about life as a film student. If you are speaking with someone who wants to become a director and is attending one of the top film schools for future directors of films, you will get a firsthand review of the program. That review of the program from someone you trust who is already paying for it can help you find the right school for you to also become a director. Online reviews from anonymous students can be useful, though personal recommendations will help you choose between the top film schools for you.