Take a look at production images from the films:

Andrew Coulson hosts School Inc., a worldwide quest for answers to the question: if you create better teaching methods, why doesn't the world beat a path to your door, like other industries? Credit: Kay Krewson

Swedish test results have fallen, partially due to a culture of student controlled public schools. Private schools, like this one featured in School Inc., are looking to break that trend by returning to a more traditional model. Credit: Courtesy of Free To Choose Media

Low-cost private schools in India were once regarded as a way to take advantage of the poor, but now routinely outperform government schools across the country, as seen in School Inc. Credit: Courtesy of Free To Choose Media

A group of teachers from Cranbrook Schools discuss what makes their facility one of the top 10 private high schools in the U.S. and why it's a difficult thing to scale up for more students to use, in School Inc.

Students in Texas discuss the differences between their previous schools and the KIPP Academy charter school. School Inc. investigates why it's one of the few institutions having success in expanding to other locations. Credit: Courtesy of Free To Choose Media

Andrew Coulson hosts School Inc., where he pays a visit to Chile to find out why there is a constant threat to shut down for-profit private schools despite their thriving success. Credit: Courtesy of Free To Choose Media

School Inc. tells the story of students from the American Indian Public Charter School and how the attitudes of their teachers effect the choices they make in the classroom and how it leads to student success. Credit: Courtesy of Free To Choose Media

Widespread innovations in the classroom have not taken place since blackboards made their way into small schoolhouses during the 19th century. School Inc. sets out to explore why. Credit: Courtesy of Free To Choose Media

Angelo Villavicencio gives a first-hand account of teaching with Jaime Escalante, in School Inc., and how his teaching techniques, although they produced results, failed to win support by other educators.

As seen in School Inc., tutoring groups, or Hagwons like this one in South Korea, are big business and provide educators incentive to continuously better their techniques with the highest paid teachers earning millions of dollars. Credit: Courtesy of Free To Choose Media

Caption: Andrew Coulson explores Carpenter’s Hall in Philadelphia as he looks for answers to why there has been constant conflict over what is taught in public schools, in the new documentary, School Inc. Credit: Kay Krewson

Andrew Coulson looks over the South Korean horizon. In the new documentary, School Inc., he investigates why some of that country's top teachers earn more than the nation's highest paid baseball players. Credit: Kay Krewson
School Inc. – A Personal Journey with Andrew Coulson, Premieres April 4, 2017 on PBS. Check your local PBS station for air dates.