CHRISTOPHER WONG ’92. For nine months in 2005–06 banker-turned-filmmaker Wong followed the rookie New York City public-school principal Edward Tom during the inaugural year of an experimental school, the Bronx Center for Science and Mathematics. This ­documentary film follows the principal as he pushes the students to succeed, and the students as they struggle with family issues. The film, which Wong directed and produced, will   be broadcast nationally on PBS’s “Independent Lens” series March 30.   A DVD of the film will be available   by the end of March from www.