Unlike school vouchers for low-income students, charter schools in disadvantaged communities, or bonus pay for teachers in inner-city schools, digital learning is not designed for just one slice of the population. It’s not a policy that parents might support in theory but, because it has no practical impact on them, won’t spend political energy promoting or defending. Rather, if it works as well as its proponents hope, digital learning will gather political support from a wide swath of the American public.