Adele sang effortlessly and beautifully, as Fallon nodded his head in time with the music and banged gently on a wood block.

Other featured classroom instruments were a xylophone, hand clappers and a kazoo.

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About halfway through the video, Adele grabbed a green plastic telephone and sang into the phone to her imaginary ex.

>>Click here to watch the video on YouTube.

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Jameson Clanton (from left), Josiah Travis Kent Rogers, Lowes Moore, Rudy Foster and Bryce Valle perform as the Temptations in the musical “Ain’t Too Proud” at the Fox Theatre on Friday and Saturday. (Courtesy of Joan Marcus)

Credit: (Courtesy of Joan Marcus)

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Anthony Oliver (center) of the Hall County Sheriff's Office's dive team instructs Tyler Guthrie (left) and Michael Mitchell during a recent training session. (Hyosub Shin / AJC)

Credit: HYOSUB SHIN / AJC