We've all read in Variety or The Hollywood Reporter of some no-name screenwriter selling his or her screenplay for a million bucks. Ever wonder how they did it? What structure did they use? What "tricks of the trade were" employed?
May I introduce Paul Castro, the original writer of one of my favorite films August Rush. Paul Castro is a produced, award-winning screenwriter and world-renowned screenwriting professor.

"Structure...is the canvas on which we paint with words." - Paul Castro

His project, August Rush was produced by Warner Brothers and starred the late great Robin Williams, Keri Russell, Freddie Highmore and Jonathan Rhys Meyers. The film took Paul Castro into the belly of the Hollywood beast.
The business of screenwriting can be tough, but while a student at the UCLA School of Theater, Film, and Television, he was a finalist for the Coca-Cola Refreshing Filmmaker's Award for directing and producing his original screenplay Healing, and landed a three-picture screenwriting deal worth $1 million.
The lessons he learned not only from selling August Rush but many other Hollywood screenwriting adventures were invaluable. He later went back and became a screenwriting professor at UCLA School of Theater, Film, and Television, teaching thousands of students over his ten years of teaching.

“Paul Castro teaches screenwriting from the inside out.” - Richard Walter, UCLA Screenwriting Chairperson.
Enjoy this whopper of a podcast episode and if you haven't seen August Rush do yourself a favor and watch it. It's worth watching for Robin Williams alone!