School teachers are here to teach a different lesson — through K-pop dance

More than 80 dancers move through a series of shifting formations in a dance challenge video set to Taeyang's latest song, "Live Fast Die Slow." They step briskly across the floor, roll their shoulders to the beat and break into bursts of headbanging. As the group closes into a circle, one dancer drops to the floor for a headspin. The video has drawn more than 420,000 views in two weeks. Taeyang himself liked the clip and shared it on social media. It sounds like a professional dance crew. In fa