This summer on Planet Money, we're bringing you the entire history of the world, at least the economics part.

It's Planet Money Summer School.

Every week, we'll invite in a brilliant professor and play classic episodes about the birth of money, banks, and finance.

There will be rogues and revolutionaries and a lot of panics.

Summer School, every Wednesday till Labor Day on the Planet Money podcast from NPR.

You're listening to Life Kit from NPR.

Hey everybody, it's Marielle.

I remember my first day of, I think it was sixth grade.

I showed up in this cute outfit that I had loved the day before.

If I remember right, there was a plaid skirt and a maroon cardigan.