One of the four potted "hope trees" in the "Dear Boston" exhibition. "We asked visitors to express their hopes for Boston and the world on a tag, and then hang it on a tree: a way to reflect--and have your reflection be public--at the one year anniversary," says Tisdale. "Often in museum exhibitions the 'talkback' station can fall flat -- people give you really bland comments, and mainly teenagers use them for lots of inappropriate language when no one's looking. But in this case it really worked, I think because we gave them powerful, important content and framed it in a way that invited them to rise to their best selves. Visitors hung roughly 15,000 tags during the 5-week exhibition run." Photo: Christian Phillips.

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