"Last Week Tonight" host John Oliver on Sunday devoted his long-form investigative segment to charter schools, the supposed bi-partisan panaceas that are surprisingly under-regulated.
Oliver noted a 2013 study that found quality of education varies greatly from school to school, which he said "is putting it mildly."
"Around the country, there have been charter schools so flawed, they don't make it through the school year," he explained, rolling a series of clips from local news reports of charter schools unexpectedly closing their doors.
"When schools close that fast, it's shocking because you would assume someone would rigorously screen a school before it was allowed to open, making sure it was financially and academically sound," he added. "But that is not always the case."