Alva Review-Courier -

Oklahoma’s largest online charter school is on a track of explosive growth, nearly tripling its enrollment over three years, to almost 8,500.

That pursuit of lightning growth by Epic Charter Schools – a goal affirmed by its co-founder – shows no signs of letting up. Epic officials predict enrollment will near 10,000 by mid-school year.

But the trend is raising concerns from one top online charter-school regulator about whether there is too much turnover of students. And at least one national report warns that rapid expansion at virtual charter schools can compromise academic achievement.

Epic’...