When leaders of Purdue University wanted to move into online education, they took the unusual step of buying an existing online university, a big one with 30,000 students. And here’s the most surprising part: that online school it bought, Kaplan University, was a for-profit business—part of a sector that’s been criticized for high costs and poor outcomes for students.

The deal sparked vocal protests from Purdue professors, and hundreds of them signed petitions opposing the arrangement, calling it an unprecedented privatizing of public education. Purdue leaders, meanwhile, say that Kaplan has better outcomes than other for-profits and that it serves an important audience of adult students who aren’t able to go to a traditional campus.

This month Purdue University Global held its first graduation under the new banner. But what exactly is different now at the online institution, and how does this whole thing work?

To try to get some answers, EdSurge talked with Betty Vandenbosch, the chancellor of Purdue University Global, who had been leading Kaplan University for the past few years.