On the most recent episode of “Last Week Tonight,” Oliver took on the 6,000 charter schools in the US and everyone involved with them. (Content warning on that link, natch. When he thinks he’s losing the studio audience, Oliver says a curse word which makes them giggle.) By attacking this popular K-12 option, he isn’t just hitting the few bad operators in the segment, but is setting his sights on the parents, teachers, and students who’ve decided that charter schools are their best option.