Jordan Shapiro's class last week delved into a weighty discussion of Plato's allegory of the cave and shifting perceptions of reality.
Front and center on the classroom wall behind him flashed a constantly shifting series of posts on Twitter, all under the class hashtag of #Mosaic1.
With her Nook and phone at hand, sophomore Kaylyn Christian, 20, tweeted: "Are you really happy if you live a successful life in the shadows?"
Shapiro's Temple University classroom is definitely not the norm in academia, but it could be a harbinger of the future.
While many professors at Temple and beyond ban tweeting and texting in class, Shapiro, a full-time instructor who started last year, encourages it.
Even more so - he counts it as classroom participation. He often tweets back.
"Please tweet. Please do it," Shapiro, 35, tells students at the start of the semester.
Christian, a psychology major from Princeton, is happy to comply.
"I always like to look up at the screen," she said, "and see what others are saying, too."
Dressed in a sleek black blazer and jeans with a woolly mop of hair, Shapiro looks and acts the part of the hipster instructor. He says on his Twitter page: "Doing my best to un-educate students at Temple University."
He recently wrote a piece for Forbes - "Colleges Shouldn't Be Jittery About Students Who Are Twittery" - outlining the conundrum playing out on campuses nationwide.
"The tech industry and university administrators are flooding institutions with online-learning platforms, filling classrooms with new smart tools, and trying to equip their students with the digital skills that appeal to corporate employers," he wrote.
"Meanwhile, the faculty prefers to play the part of the curmudgeonly old guard - the ogre at the bridge, trying to keep innovation from crossing. Many professors ban all electronics from their classrooms. Others penalize students who are caught tweeting or texting by marking them absent for the day."
What really made Shapiro happy during class last week was Elizabeth Moore, 25, a junior advertising major from Penn Valley, who vigorously pounded on her phone as discussion ensued.
"I was actually on Facebook and also texting," Moore said later. She was excited about the discussion and wanted to tell a poet friend who "is very into this whole reality thing" so she could share his quotes with the class on the Twitter feed.
"Socializing about Plato? Is there a better thing? That's how they're using their phones," Shapiro said. "I felt completely validated."
Shapiro emphasized that he was not critical of other professors who do not use Twitter, such as his colleague Richard Libowitz, an associate professor who teaches the same humanities class as Shapiro. It's a required general-education course designed to teach students to think critically and to express themselves articulately.
Libowitz, 64, bans tweeting, texting, and other phone uses in class.
"I find tweeting kind of annoying," said Libowitz, a self-described technological Luddite. "It's worse than passing notes when we were kids."
Technological expertise aside, Libowitz, a writer who has a bachelor's degree in English, is disturbed that the written word has been overrun by a new language - that of the tweet.
"I'm still old-fashioned enough that I think the best way of learning is reading and talking," he said.
There's really no wrong or right answer, said Sree Sreenivasan, chief digital officer at Columbia University. Each professor must decide which technology supports his or her teaching best.
If students are tweeting, he said, "there has to be a purpose."
As a journalism professor teaching social media, Sreenivasan also uses Twitter in class, but has some rules.
"I tell them they can tweet anything I say, but they cannot quote a fellow student. The classroom has to be a safe place" for students to express opinions without ridicule.
Temple has no formal policy on tweeting in class; it's up to each professor, a spokeswoman said.
During class last week, Libowitz used an age-old technology to help inform a discussion on the role marijuana plays in society. He showed film clips from "Reefer Madness" and "History of the World: Part 1," and Michael Pollan's "The Botany of Desire."
His students followed the rules and kept their phones away - and none said they minded. "If my phone is out, I'm honestly not paying attention," said Taylor Dugger, 19, a sophomore and public-health major from Brooklyn, N.Y.
Shapiro knows his students probably use their phones for non-classroom purposes at times. He's not dismayed.
"I don't care if you text your friends as long as you're present, you know what's going on, and you can multi task," he said.
His students said they liked the classroom Twitter.
"It's a much more progressive way to run a classroom," said frequent tweeter Matt Zarley, 19, a sophomore theater major from Pottstown. It sends the message, "We're trying to meet you on different levels here, really get you invested."
During a discussion on Freud, Zarley tweeted: "Man, this is bleak. I wonder how many parties Freud wasn't invited to."
Luke Harrington, 19, a freshman journalism major from Philadelphia, said he enjoyed participating on multiple platforms.
"It helps you retain the information from class a little better," he said.
Shapiro sometimes gets instant feedback.
"Not a clue what's goin' on," a student tweeted during a recent class.
Shapiro said he paused: "I thought, OK, I'm losing them. How do I shift the conversation?"
A handful of students tweeted during class last Wednesday. Shapiro explained that it was only the third week of the semester and that if past classes were any indication, the tweeting would pick up with time.
Shapiro likes flashing tweets on the board during class, though the technology wasn't working as well as he had hoped.
"The animation," he said, while possibly distracting to older people, "to this generation, it's like the equivalent of knitting."
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