Every year, 130 million migrant workers in China make their way home for New Year celebrations. In this dramatic clip from 'Last Train Home,' the Zhangs brave massive crowds of people and long lines in order to travel home and see their children.

In this clip from 'Last Train Home,' Qin expresses her frustrations with the lives and occupations that her parents have chosen.

In this deleted scene from 'Last Train Home,' the Zhangs as well as other migrant workers become annoyed with police officers at Guangzhou train station. They begin to voice their opinions to the law enforcement, but are unsuccessful.

In this deleted scene from 'Last Train Home,' New Year celebrations in Huilong bring vibrant costumes, music and parades to the village. The Zhangs enjoy the festivities in the village center as well as back at their modest home.

In this deleted scene from 'Last Train Home,' migrant workers waiting at China's Guangzhou train station express their frustrations and disappointments with factory life and traveling home for the New Year.

In this clip from 'Last Train Home,' a Chinese worker travels home for New Year celebrations. He becomes frustrated by the time it takes him to get home, as when he finally reaches his destination, he will see his 3-month-old son for the first time.

In this exclusive clip from 'The Learning,' Angel, an immigrant teacher from the Philippines, prepares students in her class for a standardized test for Maryland public schools. She expresses her desire for her students to do well, but also describes her love of teaching after the test is taken, when she can focus on learning skills for life rather than just for test day.

Grace, one of the teachers featured in 'The Learning,' updates the audience about what has happened since cameras stopped rolling. She now lives with her family and her sister in Baltimore, and is in her sixth year of teaching in the Baltimore public school system.

Rhea, one of the teachers featured in 'The Learning,' updates the audience about what has happened since cameras stopped rolling. Her son now lives with her in Baltimore and she strives to live solely in the present, not worrying too much about the future.

In this exclusive clip from 'The Learning,' Rhea, an immigrant teacher from the Philippines, talks about the future with her students. She asks each of the students what they wish to be when they grow up, as well as what they are going to do over the summer as the school year is close to over. A student's prediction about another student's future profession, however, catches her off guard.

In this exclusive clip from 'The Learning,' Dorotea, an immigrant teacher from the Philippines, calls in a student's mother after there is a question about classroom behavior. What begins as a simple argument over chewing gum, quickly escalates to a more general discussion about a student's respect for a teacher.

Filmmaker Ramona Diaz sits down with POV to discuss her new film 'The Learning.' Following the live of four Filipina women as they leave the Philippines to teach in the Baltimore public school system, Diaz hopes her film raises questions about the social costs and culture shock experienced by many immigrants.

In this clip from 'The Learning,' the teachers return home to the Philippines and realize the fruits of their labors. Their higher salaries improve the standard of living for their families, but as one explains, they cannot pull their families from "rags to riches" all by themselves.

One hundred years ago, American teachers established the English-speaking public school system of the Philippines. Now, in a striking turnabout, American schools are recruiting Filipino teachers. "The Learning" is the story of four Filipino women who reluctantly leave their families and schools to teach in Baltimore. Their ideals about America, however, soon clash with Baltimore's tough realities.

In this clip from 'The Learning,' the teachers adjust to teaching in the Baltimore school system. The differences in cultures prove challenging to navigate, but they find they are worth working through when they receive their first paychecks and send money home to the Philippines.

In this clip from 'The Learning,' four Filipino teachers leave the Philippines in order to provide a better life for those at home. They leave behind their schools, children and extended families to immigrate to Baltimore in order to find "greener pastures."

In this exclusive clip from 'The Learning,' Dorotea, an immigrant teacher from the Philippines, discovers that one of her students is pregnant. She discusses the pregnancy with the student, and helps her determine what steps she will take to continue her education despite the pregnancy.

Dorotea, one of the teachers featured in 'The Learning,' updates the audience about what has happened since cameras stopped rolling. She now lives with her family in Baltimore and is in her sixth year teaching in the Baltimore public school system. In regards to recent visa sponsorship issues, she simply says they will have to wait and see what happens.

This clip, from 'If A Tree Falls: A Story of the Earth Liberation Front,' describes how members of the ELF were able to covertly communicate and evade authorities. It describes the "book club" that trained new recruits in using books as a code source, before beginning to work with computer encryption techniques.

In this clip from 'If A Tree Falls: A Story of the Earth Liberation Front,' interviews and news footage recount the story of the arsons set by the Earth Liberation Front. The ELF committed these acts of arson as a form of protest, sparking controversy within in the environmental movement as well as criticism from authorities.