WWND? What would Nana Do?

The lone red binder sits atop the kitchen table, its contents revealing last night's homework, painstakingly completed prior to the fencing lesson.

Do you bail child number two out of his late assignment penalty by driving back to school and walking the binder to class? The assignment will probably still be counted late, but he won't spend the morning fretting about what he did with his binder...

Or do you go about your business, leaving him to fret and thereby teaching him a life lesson about being responsible for packing everything in your backpack prior to heading out to the driveway to swashbuckle?

What would your choice be? What would the world's best mom, now known as Nana, have done?

I know what I'll be doing...now where did I put my car keys???