All aboard the charters? The state of a movement.(EDUCATION)(charter schools)

CHARTER schools have taught us much. Since Minnesota enacted America's first charter law in 1991, 39 states have followed suit and eager school reformers have created some 4,000 of these independent public schools. About 3,600 are still operating today, enrolling approximately a million kids, 2 percent of all U.S. elementary and secondary pupils. More than a dozen cities--including Detroit, Cleveland, and Milwaukee--now have charter sectors that serve at least one in every six children. These numbers rise annually--and would balloon if the market were able to operate freely, unconstrained by legislative compromises, funding and facilities shortfalls, and local pushback from the school establishment and its political allies.

The first lesson is that the demand for alternative school options for children is intense--and plenty of people and organizations are eager to meet it wherever policy and politics allow them to. In Dayton, Ohio, today, more than a quarter of all kids attend charter schools; in New Orleans (a special case, to be sure) it's seven out of ten children. Many schools across the nation have waiting lists.

Lesson Two: Though critics warned that charters would "cream" the best-parented, ablest, and most fortunate youngsters, actual enrollments are dominated by poor and minority kids, ex-dropouts and others with huge education deficits unmet by regular school systems--most often the urban school…