THESE days, when a nursing student at the University of Iowa fields a question about a drug, “the answer is often, ‘I don’t know, but give me a few seconds,’ and she pulls out her phone,” according to Joann Eland, an associate professor there.

In just a few years, technology has revolutionized what it means to go to nursing school, in ways more basic — and less obvious to the patient — than learning how to use the latest medical equipment. Nursing schools use increasingly sophisticated mannequins to provide realistic but risk-free experience; in the online world Second Life, students’ avatars visit digital clinics to assess digital patients. But the most profound recent change is a move away from the profession’s dependence on committing vast amounts of information to memory. It is not that nurses need to know less, educators say, but that the amount of essential data has exploded.

“There are too many drugs now, too many interactions, too many tests, to memorize everything you would need to memorize,” says Ms. Eland, a specialist in uses of technology. “We can’t rely nearly as much as we used to on the staff knowing the right dose or the right timing.”