The New York Times has spent several months examining this idea, focusing on K12 Inc. A look at the company’s operations, based on interviews and a review of school finances and performance records, raises serious questions about whether K12 schools — and full-time online schools in general — benefit children or taxpayers, particularly as state education budgets are being slashed.

Instead, a portrait emerges of a company that tries to squeeze profits from public school dollars by raising enrollment, increasing teacher workload and lowering standards.

Current and former staff members of K12 Inc. schools say problems begin with intense recruitment efforts that fail to filter out students who are not suited for the program, which requires strong parental commitment and self-motivated students. Online schools typically are characterized by high rates of withdrawal.

Teachers have had to take on more and more students, relaxing rigor and achievement along the way, according to interviews. While teachers do not have the burden of a full day of classes, they field questions from families, monitor students’ progress and review and grade schoolwork. Complaints about low pay and high class loads — with some high school teachers managing more than 250 students — have prompted a unionization battle at Agora, which has offices in Wayne, Pa.

A look at a forthcoming study by researchers at Western Michigan University and theNational Education Policy Center shows that only a third of K12’s schools achieved adequate yearly progress, the measurement mandated by federal No Child Left Behindlegislation.

Unsurprisingly, the Times is not impressed.