Image used for illustrative purposes. Kyle Schwartz (C), a 3rd grade teacher, works with students Mckylah Lenkiewicz (L) and Juliana Enquist in her classroom at Doull Elementary School in Denver April 17, 2015. Schwartz, who posted notes from her third grade class online and started a social media whirlwind under the hashtag #IWishMyTeacherKnew . REUTERS/Rick Wilking - RTR4XT68
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