No surprise here. The biggest of the for-profit virtual school corporations, K12, has as many as 275 students to one teacher, according to this report in Florida.
This is what is described by promoters of the “Ten Elements” of digital learning as personalized, customized learning for the 21st century. Others might call it a profitable scam.
Remember P.T. Barnum said that there is a sucker born every minute. Someone else said that no one ever went broke underestimating the intelligence of the human race.
K12 proves the cynics right.
Diane Ravitch's blog 
I think it’s critical that we get the real story of virtual charters out to the public. Virtual charters are sold with the illusion that they are directed solely to your child, as if the computer your child sits in front of every day is a real person (you know, like a teacher), often using the marketing oxymoron “Mass Customization”. The virtual charter charlatans spin a fantasy that compares the “customized” learning your child gets from a machine to the large unruly and “industrialized” education of the public school. And of course, those public schools are run by corrupted politicians, selfish union bosses and teachers, and incompetent parents.
The truth? We now see that the virtual charters provide nothing but truly massive mass instruction, structured to maximize corporate profits, not individual students, and guaranteed by ALEC-drafted legislation that is peddled by politicians who are beholden to the virtual charter schools corporations, ALEC, and Jeb Bush.
There’s a university in Colorado that’s been advertising like crazy around here lately. It has all these students stating that they don’t want to be “just a face in the crowd,” and that they want to “learn to stand out.” And yet, it’s for an online program! The irony is delicious!