Instructor Eric Thal
American English Master was founded by Eric Thal, a professional actor in film, television, and theatre, and a native speaker of American English. Known for his naturalistic delivery of lines as an actor, he devised a system, created out of his understanding of acting, to teach the subtleties of spoken American English to non-native speakers. After decades of work as a professional actor, and years working as a private accent coach to hundreds of students from a variety of (language) backgrounds and professions, he developed his system to teach the American accent to everyone. His system is logical, creative, and fun.
You can learn more about him at imdb.com and at Wikipedia.