More than half of prisoners in the U.S. don't have basic math skills.
The documentary follows a teacher reconnecting with his former student.
The study of one correctional facility illustrates a prison system shaped by declining food services.
Low wages and rising prices of instant noodle packets mean prisoners taking on second jobs, according to one study.
Justice Department to phase out federal contracts.
17 percent of the prison population is positive for hepatitis C. Expensive new drugs could help.