The hot hot summer has begun to cool and soon it’s time for back to school. Since I’m not a teacher and no longer a student, and since my son is still in diapers, I can think about the first day of school without panic. (Though I do still have that recurring dream about not knowing where any of my classes are…)  Memories of the first day of school are heavy with nostalgia for me and, I imagine, for many of you.  I was a nerd kid, and I used to lay out all of my school supplies on the carpet just to look at them in the weeks before…