With the Obama administration pouring billions into its nationwide campaign to overhaul failing schools, dozens of companies with little or no experience are portraying themselves as school-turnaround experts as they compete for the money.

A husband-and-wife team that has specialized in teaching communication skills but never led a single school overhaul is seeking contracts in Ohio and Virginia. A corporation that has run into trouble with parents or the authorities in several states in its charter school management business has now opened a school-turnaround subsidiary. Other companies seeking federal money include offshoots of textbook conglomerates and classroom technology vendors.

Many of the new companies seem unprepared for the challenge of making over a public school, yet neither the federal government nor many state governments are organized to offer effective oversight, said Jack Jennings, president of the Center on Education Policy, a nonprofit group in Washington.

“Many of these companies clearly just smell the money,” Mr. Jennings said.

Rudy Crew, a former New York City schools chancellor who has formed his own consulting company, said he was astonished to see so many untested groups peddling strategies to improve schools.