I was never a big fan of formal education, so when my son decided he had better things to do than attend his high-school classes, I supported him. He wanted to become a filmmaker, and I wrote notes to excuse him from school so that he could shoot film and go to the movies.

He attended only enough classes to graduate, and I wrote many excuse notes, always to a woman named Ms. Finn. I pictured Ms. Finn as half librarian, half prison warden, frowning at my notes, scrutinizing every word, looking for some hole in the iron-clad excuses I had concocted. This battle of wits with Ms. Finn inspired me to write even better excuses, brimming with legitimacy. I raised the excuse note to an art form.