Blake Farmer

There's a school bus driver shortage in districts from Indiana to Florida, and Nashville, Tenn., has one of the most pressing. Nearly a quarter of the city's 550 slots for drivers are unfilled — and that's when no one is sick.

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Opioids have a stranglehold on parts of the U.S. And where addictive pain medicines are the drug of choice, clinics for addiction treatment often follow.

Sometime these are doctor's offices where patients can get painkiller-replacement drugs, such as Subutex and Suboxone.

Ninety percent of students at Hobgood Elementary in Murfreesboro, Tenn., come from low-income households. Most of the school's teachers don't. And that's a challenge, says principal Tammy Garrett.

"If you only know middle-class families, you may not understand at times why they don't have their homework or why they're tired," Garrett says.

"Chow bus! Chow bus! Chow bus!" chants Gunner Fischer, 3, as a custom-painted school bus rounds the corner and rumbles toward his apartment complex in Murfreesboro, Tenn.

About 21 million students nationwide eat free and reduced-price meals throughout the school year, but getting those same kids fed during the summer is a challenge. Only a fraction of those make it to schools or community centers for summer meals.