You may have seen the “no homework” letter I wrote last week. It ended up being shared quickly by thousands around the world when Samantha Gallagher, the parent of one of my students, put it on Facebook. My only intention in writing it was to explain ― to the 21 parents in my class ― that I would no longer assign nightly homework to my second graders, and to explain why I thought it was in the best interests of their children. I had no intention of sparking a worldwide conversation. But I’m grateful I did.