A year into leaving the classroom, here's what I've learned: no one does anything worthwhile alone. This summer, I'm noticing it everywhere — on playgrounds, in restaurants, at airports. Systems that hum without a director. Communities that form without a memo. If it's true out there in the world... why are so many teachers still trying to do it alone in their classrooms?

I didn't notice I was missing her until the third time it happened. Michiko was a good kid — easy to overlook, and I was overlooking her. This is the story of what I did when I realized I couldn't fix it alone, and what a Japanese airport taught me about why one teacher is always a single point of failure.