Airs Sunday, May 21, 2017, at 6 p.m. In the 25 years since Minnesota passed the first charter school law, these publicly funded but privately operated schools have become a highly sought-after alternative to traditional public education. Many charter schools boast of high test scores, strict academic expectations, and high graduation rates. Opponents argue that charters, which are subject to fewer regulations and less oversight, lack accountability, and take much-needed resources from public schools. Are charter schools overrated?