Madalitso Mulando knew what she needed to finish 10th grade: $150.
That's the cost of tuition at Chinika Secondary School, a public high school in Lusaka, Zambia.
Completing 10th grade was part of Mulando's dream to go to medical school and become a doctor.
But the 15-year-old's parents were broke.
"Yeah, I was alone. I was in my bedroom ... and I started, like, crying because Mom and Dad didn't have any money," she remembers. "And I was like, maybe I'll never go to school again because Mom and Dad didn't have any money."