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Transgender teacher returns to school as a woman

Image: Karen Scot prepares for her first day teaching as a transgendered woman
Karen Scot, 56, gets dressed at her North Fork, Calif., home before her first day teaching as a woman at Yosemite High School in Oakhurst, Calif. Scot has been a science teacher for 30 years.Max Whittaker / Prime for NBC News