At least 100 million Americans have some sort of medical debt. But, the group with the highest rates of medical debt might surprise you.

The big picture: Nearly 1 in 4 middle-class Americans, people who earn $50,000-$100,000 a year, have unpaid medical bills, according to a new report from the think tank Third Way. We take a look at why middle-class Americans have the highest rates of medical debt.

• Plus, we follow our teacher shortage reporting with teachers' own stories.
• And, a lack of bus drivers adds to the back-to-school chaos.

Guests: Axios' Tina Reed and Stephen Totilo.

Credits: Axios Today was produced by Niala Boodhoo, Alexandra Botti, Fonda Mwangi and Alex Sugiura. Music is composed by Evan Viola. You can reach us at podcasts@axios.com. You can send questions, comments and story ideas to Niala as a text or voice memo to 202-918-4893.