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World renowned news journalist and anchor Christiane Amanpour surprises NYU students when she takes over their International Politics of the Middle East class as a guest lecturer.

Bill Maher surprises a Political Science class at UCLA, squares off with its Republican professor and discusses everything from the GOP sugar daddy, primary madness, Mormon magic undies and more. Watch the feature and bonus clips below.

Yesterday, for our latest episode of Stand In, we brought famed political correspondent Christiane Amanpour in as a surprise guest lecturer for an “International Politics of the Middle East” course at NYU.

Yesterday for our latest episode of Stand In, we brought a little surprise to a political science class at UCLA, hard-nosed progressive political commentator Bill Maher.

Congrats to Ellen Johnson Sirleaf and Leymah Gbowee of Liberia and Tawakul Karman of Yemen Share Nobel Peace Prize.

South Park creators Trey Parker and Matt Stone are the latest guest professors in mtvU’s ongoing, Emmy-nominated series. Stone and Parker hit the Tisch School of the Arts at New York University to surprise a room of freshmen.

Emmy and Tony Award-winning creators of ‘South Park’ drop in on a classroom at Tisch School Of The Arts NYU to give some advice to student screenwriters. Watch the full episode 10.03.11 on mtvU and mtvU.com.

John Legend makes an unexpected visit to Howard University and surprises a class to talk about education as a civil right, the obstacles he faced, and how students can help re-imagine the financial aid process.

The Nobel Peace Prize winner surprises a class at UCLA and talks about the past, present and future of microfinance.

Children’s Defense Fund founder Marian Wright Edelman surprises a class at San Francisco State University.