The company first launched The Great Courses Plus streaming service in 2015, but it still stocks and sells a catalog of DVDs. “Not everybody wants to learn through online courses,” said Sujik.

John Bowers, English professor at UNLV, poses for a portrait at his home in Las Vegas Sunday, Nov. 9, 2014. Bowers produced a DVD course for The Great Courses, a catalog of lectures and CDs ...