Between jokes about Harambe and the failed NBC show "The Mysteries of Laura," talk show host John Oliver delivered a screed about corruption in public charter schools on his Sunday night HBO talk show.

While Oliver didn't lie about charters, he did leave viewers with an inaccurate perception of charters and missed the most important point: Most charter students learn more in those schools than they would in a traditional public school.

Oliver was wise to set aside the debate over whether charter schools are a good or bad concept. With more than 2.5 million students attending almost 6,500 public charter schools in 43 states and Washington, D.C., the charter concept is here to stay.

Oliver also did a fair job of listing politicians who support charter schools on both sides of the aisle, including President Obama, President George W. Bush, Bernie Sanders, Donald Trump and Mitt Romney.

Oliver also mentioned a 2013 study by the Center for Research on Education Outcomes at Stanford, one of the most rigorous studies on charter schools. That study found that, overall, charters are slightly better than traditional public schools at teaching reading and about the same at teaching math.

It's odd, however, that Oliver didn't mention the center's 2015 study, which showed that urban charter schools teach students so well that they get the equivalent of 40 extra days of classroom learning in math per year, and 28 extra days in reading.

The gains are even larger for students often neglected by traditional public schools: black children living in poverty. In charter schools, those students learned 59 extra days of math and 44 extra days of reading.

But Oliver didn't set out to cover every single issue and angle on charter schools, which would take hours. He set out to highlight fraud and corruption in the way that many charter schools are run.

There was Ivy Academy in Florida, which closed after just seven weeks because it had trouble finding a school building. It also plagiarized parts of its charter application.

There's also Harambee Institute in Philadelphia. The school's previous CEO pled guilty to embezzling $80,000 from the school (it now has new leadership). An illegal nightclub was also being run out of the school's cafeteria in the evening.

Oliver gave many more negative examples, including examples of virtual public charter schools that some charter advocates hope to improve.

To be sure, this corruption is indefensible and the charter school movement should do more to weed it out. But don't forget administrators of traditional public schools cheat the system for their financial gain, too.

To name just a couple of examples, the federal government found that 12 principals in Detroit Public Schools stole nearly $1 million from the district in a kickback scheme. Before Hurricane Katrina hit New Orleans and necessitated reforms, the Orleans Parish School Board was so corrupt that the FBI set up its own desk in the district's offices.

As the Center for Research on Education Outcomes study showed, on average, charters work quite well. That means, for every Ivy Academy and Harambee Institute, there is a charter school that not only gives students the average charter academic boost, but goes above and beyond to serve students exceptionally well.

Charter school advocates should watch Oliver's report and use it to improve charter school laws and debates going forward. But Oliver focused too much on the worst parts of charter schools, without highlighting what makes most charter schools so successful. A better segment would have shown how the best charter schools operate, so that other school leaders can emulate their success.

Jason Russell is a commentary writer for the Washington Examiner.